Details of a Researcher - KONDO, Mariko

写真a

KONDO, Mariko

Scopus Paper Info

Paper Count: 25 Citation Count: 167 h-index: 6

Click to view the Scopus page. The data was downloaded from Scopus API in July 25, 2025, via http://api.elsevier.com and http://www.scopus.com .

Affiliation

Faculty of International Research and Education, School of International Liberal Studies

Job title

Professor

Degree

文学士 ( 早稲田大学 )
B.A. in Literature ( Waseda University )
英語教育学修士 ( ロンドン大学教育学研究所（英国） )
M.A.in Language and Literature in Education ( The Institute of Education, The University of London (UK) )
音声学修士 ( ロンドン大学ユニバーシティー・コレッジ・ロンドン（英国） )
M.A.in Phonetics ( University College London, University of London (UK) )
言語学(音声学)博士 ( エディンバラ大学（英国[スコットランド]） )
Ph.D.in Linguistics (phonetics) ( The University of Edinburgh (Scotland, UK) )

Mail Address

Education Background

1989.10

-

1996.09

The University of Edinburgh Linguistics (Phonetics)
1987.10

-

1989.06

University College of London, University of London Department of Phonetics
1986.10

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1987.09

Institute of Education, University of London Language and Literature in Education
1982.04

-

1983.04

Waseda University School of Education Diploma Course in Education
1978.04

-

1982.03

Waseda University School of Letters, Arts and Sciences I

Committee Memberships

2022.04

-

Now

Phonetic Society of Japan International Exchange Committee
2022.04

-

Now

日本音声学会国際交流委員長
2019.04

-

Now

日本音声学会理事
2019.04

-

Now

Phonetic Society of Japan Board member
2019.04

-

2022.03

Phonetic Society of Japan Chief editor of the Journal
2019.04

-

　

Phonetic Society of Japan, Editor-in-Chief Editor-in-Chief, Journal of Phonetic Society of Japan
2016.04

-

　

The Phonetic Society of Japan Journal editor
2016.04

-

　

日本音声学会編集委員
2009.04

-

2011.03

Experimental Phonetic Society of Japan board member
2009.04

-

2011.03

日本実験言語学会理事

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Professional Memberships

　

　

　

Acoustical Society of Japan
　

　

　

The Association of Laboratory Phonology
　

　

　

The International Speech Communication Association
　

　

　

The International Phonetic Association
　

　

　

The Linguistic Society of Japan
　

　

　

The Phonological Sciety of Japan
　

　

　

The Japan Experimental Linguistics Society
　

　

　

The Phonetic Society of Japan

▼display all

Research Areas

Linguistics

Research Interests

Phonetics, Phonology, Speech perception, Language acquisition, Speech Corpus

Papers

The role of pitch contours in Vietnamese learners' perception of Japanese vowel length

Le Thi Huyen Trang, Kondo, Mariko, Huang, Yixuan

The Abstract Book of the 3rd International Conference on Tone and Intonation 1 143 - 144 2025.05 [Refereed]
Cross-Linguistic Transfer of Acoustic Cues: Perception of Japanese Vowel Length by Learners from Vietnamese-speaking Background

Le Thi Huyen Trang, Kondo, Mariko, Tsukada, Kimiko

Second Language Research 2025 [Refereed]

DOI
Classifying Japanese fricative /s/ and affricate /ts/ at word-initial position using logarithmic durations

Shigeaki Amano, Kimiko Yamakawa, Mariko Kondo

Acoustical Science and Technology 2025 [Refereed]

DOI
The J-AESOP Corpus: Design, Application, and Future Directions of a Japanese-English Bilingual Speech Corpus

Kakeru Yazawa, Takayuki Konishi, Mariko Kondo

Acoustical Science and Technology 2025 [Refereed]

Authorship：Last author

DOI
Discrimination and evaluation of accentedness in Japanese accented English

Pérez-Ramón, Rubén, Kondo, Mariko, Amand, Maelle

Book of Abstracts Accents 2024: Accents in various contexts, 17th International Conference on Native and Non-native Accents of English 45 - 46 2024.12 [Refereed]

　View Summary

PARTICIPANTS
Amano Naosuke naosuke.amano@sant.ox.ac.uk
Archer Gemma gemma.archer@strath.ac.uk
Baran-Łucarz Małgorzata malgorzata.baran-lucarz@uwr.edu.pl
Berardo Eliana elianaberardo@hotmail.com
Bikelienė Lina l.bikeliene@gmail.com
Bradikova Nela bradikovanela@gmail.com
Broś Karolina k.bros@uw.edu.pl
Bryła-Cruz Agnieszka agnieszka.bryla-cruz@mail.umcs.pl

Severo Douglas douglasevero@gmail.com

Cal Zuzanna zuzanna.cal@amu.edu.pl
Canyurt Rafia rafcan@st.amu.edu.pl
Černelytė Laura laura.cernelyte@flf.vu.lt
Červinkova Poesova Kristyna kristyna.cervinkovapoesova@pedf.cuni.cz
Chanethom Vincent vc4@princeton.edu
Constantinescu Miha m.constantinescu@uel.ac.uk
Dong Wenwei wenwei.dong@ru.nl
Gage Laura laurak.gage@outlook.com
Gallardo del Puerto Francisco francisco.gallardo@unican.es
Gomez-Lacabex Esther esther.glacabex@ehu.eus
Gomez Martinez Marta marta.gomezm@unican.es
Grabarczyk Izabela iza.molinska@gmail.com
Gralińska-Brawata Anna anna.brawata@uni.lodz.pl
Gyurka Noemi noemi.gyurka@gmail.com
Henderson Alice alice.henderson.uds@gmail.com
Hinton Martin martin.hinton@uni.lodz.pl
Hirschi Kevin kevin.hirschi@utsa.edu
Humanez-Berral Pedro Pedro.humanez@unican.es
Jarosz Anna anna.jarosz@uni.lodz.pl
Jarosz Steven steven.jarosz@us.edu.pl
Jensen Kim khjensen83@gmail.com
Jurančič Klementina klementina.jurancic@um.si
Kawashima Tomoyuki tkawashima@gunma-u.ac.jp
Kaźmierski Kamil kamil.kazmierski@amu.edu.pl
Kirkova-Naskova Anastazija akirkova@flf.ukim.edu.mk
Kopecky Daniel daniel.kopecky01@upol.cz
Kravchuk Iryna irykra@amu.edu.pl
Kusz Ewa ekusz@ur.edu.pl
Markova Gabriela markova.gabriela@gmail.com
Matysiak Aleksandra amatysiak@ujk.edu.pl
Mompean Gonzalez Jose Antonio mompean@um.es
Nagle Charlie cnagle@austin.utexas.edu
Nodari Rosalba rosalba.nodari@unisi.it
Pawliszko Judyta jpawliszko@ur.edu.pl
Perez Ramon Ruben rperez@aoni.waseda.jp
Pesantez Pesantez Alejandra Carolina alejandracarolina.pesantezpesantez@uzh.ch
Peterson Nicholas nicholas.peterson@uni-bamberg.de
Pietraszek Mateusz m.pietraszek@ufv.es
Piukovics Agnes piukovics.agnes@btk.ppke.hu
Podlipsky Vaclav Jonaš vaclav.j.podlipsky@upol.cz
Quesada Vazquez Leticia lequesad@ucm.es
Rallo Fabra Lucrecia lucrecia.rallo@uib.es
Razzaq Ahmed Kafi kafirazzaq1981@yahoo.co.uk
Riehl Anastasia riehla@queensu.ca
Sardegna Veronica G. vsardegna@gmail.com
Schwartz Geoff geoff@amu.edu.pl
Silpachai Alif Owen asilpachai@gmail.com
Šimačkova Šarka sarka.simackova@upol.cz
Skarnitzl Radek radek.skarnitzl@ff.cuni.cz
Soria Claudia claudia.soria@ilc.cnr.it
Stolarski Łukasz lstolarski@wp.pl
Sypiańska Jolanta jolanta.sypianska@usz.edu.pl
Sczupica-Pyrzanowska Małgorzata m.szupica-pyrz@uw.edu.pl
Talley Jim talley@lingcosms.com
Trofimovich Pavel pavel.trofimovich@concordia.ca
van den Doel Rias w.z.vandendoel@uu.nl
Vilarova Mila milavilarova@yahoo.com
Wajman-Brzostowska Adrianna adrianna.wajman@gmail.com
Walczak Dominika dominika.walczak@icloud.com
Walesiak Beata beata.walesiak@uw.edu.pl
Waniek-Klimczak Ewa ewa.waniek.klimczak@gmail.com
Weckwerth Jarosław wjarek@amu.edu.pl
Wiltshire Caroline wiltshir@ufl.edu
Witczak-Plisiecka Iwona iwona.plisiecka@uni.lodz.pl
Wojtkowiak Ewelina ewelina.wojtkowiak@amu.edu.pl

DOI
Perception of Voicing Contrast of Japanese Word-Medial Plosives by Japanese and Chinese Listeners

Yixuan Huang, Mariko Kondo

5th International Symposium on Applied Phonetics (ISAPh 2024) 63 - 67 2024.09 [Refereed]

Authorship：Last author

DOI
More foreign-accented but more comprehensible: Attrition and amelioration of L1 speech in proficient L2 learners

Kakeru Yazawa, Takayuki Konishi, Rubén Pérez-Ramón, Mariko Kondo

F1000Research 13 867 - 867 2024.08

Authorship：Last author

　View Summary

<p>Background There is an increasing interest in cross-linguistic influences of the second language (L2) on the first (L1), but its communicative impact remains to be elucidated. This study investigates how L2 learners’ L1 pronunciation is perceived as foreign-accented and (in) comprehensible as a function of their L2 learning experience and proficiency levels. Methods Read speech of 154 L1 Japanese learners of L2 English in the J-AESOP corpus was examined, where approximately one-third of them had lived in English-speaking countries and the rest had never lived outside of Japan. Their L1 speech was rated by another group of native Japanese listeners for accentedness and comprehensibility (from October 25, 2022 to August 20, 2023), while their L2 speech was previously rated by native American English listeners for nativelikeness or proficiency. The speakers’ vowel acoustics were also examined. Results More proficient L2 speakers were perceived as more foreign-accented in their L1, but only if they had lived overseas; their length of residence abroad predicted the degree of perceived accentedness. In contrast, more proficient L2 speakers were consistently perceived as more comprehensible in the L1, regardless of prior overseas experience. Acoustic analyses indicated that perceived accentedness is associated with a clockwise chain shift of all vowel categories in the vowel space. It was also revealed that the dispersion, rather than compactness, of vowel production contributed to perceived comprehensibility, although the degree of L1 vowel dispersion did not predict L2 proficiency. Conclusions The overall results suggest two main conclusions. First, perceptible L1 foreign accent likely results from L1 disuse rather than L2 interference, thereby L1 pronunciation differs from native norms at a system-wide rather than category-specific level. Second, L2 learning has a positive influence on perceived L1 comprehensibility, rather than individuals with clearer and more comprehensible L1 speech being inherently better L2 learners.</p>

DOI

Scopus

1

Citation

(Scopus)
Feature-driven new sound category formation: computational implementation with the L2LP model and beyond

Kakeru Yazawa, James Whang, Mariko Kondo, Paola Escudero

Frontiers in Language Sciences 2 1 - 19 2023.12 [Refereed]

　View Summary

One of the primary questions of second language (L2) acquisition research is how a new sound category is formed to allow for an L2 contrast that does not exist in the learner's first language (L1). Most models rely crucially on perceived (dis)similarities between L1 and L2 sounds, but a precise definition of what constitutes “similarity” has long proven elusive. The current study proposes that perceived cross-linguistic similarities are based on feature-level representations, not segmental categories. We investigate how L1 Japanese listeners learn to establish a new category for L2 American English /æ/ through a perception experiment and computational, phonological modeling. Our experimental results reveal that intermediate-level Japanese learners of English perceive /æ/ as an unusually fronted deviant of Japanese /a/. We implemented two versions of the Second Language Linguistic Perception (L2LP) model with Stochastic Optimality Theory—one mapping acoustic cues to segmental categories and another to features—and compared their simulated learning results to the experimental results. The segmental model was theoretically inadequate as it was unable explain how L1 Japanese listeners notice the deviance of /æ/ from /a/ in the first place, and was also practically implausible because the predicted overall perception patterns were too native English-like compared to real learners' perception. The featural model, however, showed that the deviance of /æ/ could be perceived due to an ill-formed combination of height and backness features, namely */low, front/. The featural model, therefore, reflected the experimental results more closely, where a new category was formed for /æ/ but not for other L2 vowels /ɛ/, /ʌ/, and /ɑ/, which although acoustically deviate from L1 /e/, /a/, and /o/, are nonetheless featurally well-formed in L1 Japanese, namely /mid, front/, /low, central/, and /mid, back/. The benefits of a feature-based approach for L2LP and other L2 models, as well as future directions for extending the approach, are discussed.

DOI
Perception of Vietnamese nasal consonants by Japanese learners of Vietnamese

Trang, Le Thi Huyen, Kondo, Mariko

Proceedings of the 36th General Meeting of the Phonetic Society of Japan 1 160 - 165 2023.09

Authorship：Last author
The roles of VOT and f0 in identifying voicing contrasts of Japanese word-initial plosives: A comparative analysis of Japanese and Mandarin native speakers

Huang, Yixuan, Kondo, Mariko

Proceedings of the 37th General Meeting of the Phonetic Society of Japan 66 - 71 2023.09
Logarithmic durations for classifying and predicting Japanese voiced and voiceless plosive

Yamakawa, Kimiko, Amano, Shigeaki, Kondo, Mariko

Proceedings of the 20th International Congress of Phonetic Sciences 4048 - 4051 2023.08 [Refereed]
L2 proficiency predicts accentedness and comprehensibility

Yazawa, Kakeru, Pérez-Ramón, Rubén, Kondo, Mariko

Proceedings of the 20th International Congress of Phonetic Sciences 2840 - 2844 2023.08 [Refereed]
Nativeness and intelligibility of Japanese accented English consonants by French Listeners

Pérez-Ramón, Rubén, Kondo, Mariko, Detey, Sylvain, Fontan, Lionel, Amand, Maelle, Kamiyama, Takeki

Proceedings of the 20th International Congress of Phonetic Sciences 2581 - 2585 2023.08 [Refereed]
Spectral and temporal implementation of Japanese speakers’ English vowel categories: A corpus-based study

Kakeru Yazawa, Takayuki Konishi, James Whang, Paola Escudero, Mariko Kondo

Laboratory Phonology 24 ( 1 ) 1 - 33 2023.03 [Refereed]

　View Summary

This study investigates the predictions of second language (L2) acquisition models — SLM, PAM-L2, and L2LP — on how native (L1) Japanese speakers implement the spectral and temporal aspects of L2 American English vowel categories. Data were obtained from 102 L1 Japanese speakers in the J-AESOP corpus, which also includes nativelikeness judgments by trained phoneticians. Spectrally, speakers judged to be less nativelike showed a strong influence of L1-L2 category assimilation, except L2 /æː/ whose dissimilarity from L1 categories likely triggered new category formation, in accordance with SLM and PAM-L2. However, more nativelike speakers showed vowel spectra similar to those of native English speakers for all vowels, which aligns better with L2LP. Temporally, although speakers tended to assimilate the phonetic length of English vowels to Japanese phonemic length distinctions, segment-level L1-L2 category similarity was not a significant predictor of the speakers’ nativelikeness. Instead, implementation of prosodic-level factors such as stress and phrase-final lengthening were better predictors. The results highlight the importance of suprasegmental factors in successful L2 category learning and also reveal a weakness in current models of L2 acquisition, which focus primarily on the segmental level. The use of speech corpora for L2 research is discussed.

DOI

Scopus

4

Citation

(Scopus)
Perception of Japanese Accented English Segments in Words

Kondo, Mariko, Pérez-Ramón, Rubén

Journal of Second Language Studies 6 ( 2 ) 210 - 237 2023 [Refereed] [Invited]

Authorship：Lead author

DOI

Scopus

1

Citation

(Scopus)
Nativeness rating of Japanese accented vowels of English: a multi-task comparison

Pérez-Ramón, Rubén, Kondo, Mariko

Proceedings of the 36th General Meeting of the Phonetic Society of Japan 97 - 102 2022.09
Perception of segmental foreign accent by American and Japanese listeners: the case of Japanese accented /l/ and /r/

Pérez-Ramón, Rubén, Kondo, Mariko

Acoustical Science and Technology 1-9-4 999 - 1002 2022.09
Vietnamese speakers' mispronunciation of Japanese singleton and geminate stops

Kimiko Yamakawa, Shigeaki Amano, Mariko Kondo

Acoustical Science and Technology 43 ( 5 ) 241 - 250 2022.09 [Refereed]

DOI

Scopus
A comparison of rhythm metrics for L2 speech

Yazawa Kakeru, Kondo Mariko

Speech Prosody 2022 332 - 336 2022.05 [Refereed]

DOI

Scopus

2

Citation

(Scopus)
Classification of fricative /s/ and affricate /ts/ at various speaking rates

Shigeaki Amano, Kimiko Yamakawa, Mariko Kondo

Acoustical Science and Technology 43 ( 3 ) 197 - 200 2022.05 [Refereed]

DOI

Scopus
Foreign accent self-awareness and intelligibility at the segmental level

Rubén Pérez-Ramón, Mariko Kondo

New Sounds 2022 2022.04 [Refereed]
Perceptual boundary and discrimination sensitivity of Japanese singleton and geminates tops in Japanese and Taiwanese Mandarin speakers

Yamakawa, Kimiko, Shigeaki Amano, Mariko Kondo

Acoustical Science and Technology 43 ( 2 ) 96 - 104 2022.03 [Refereed]

DOI

Scopus

1

Citation

(Scopus)
Erratum: Mispronunciation of Japanese singleton and geminate stops by Korean and Taiwanese Mandarin speakers, (Acoustical Science and Technology (2021) 42:2 (73–82) DOI: 10.1250/ast.42.73)

Kimiko Yamakawa, Shigeaki Amano, Mariko Kondo

Acoustical Science and Technology 43 ( 1 ) 81 2022.01

　View Summary

The following corrections should be made to the article entitled ‘‘Mispronunciation of Japanese singleton and geminate stops by Korean and Taiwanese Mandarin speakers,’’ by Yamakawa, K., Amano, S. and Kondo, M., which appeared on pp. 73–82 in 42(2) 2021 issue of Acoustical Science and Technology. Equation (1) on page 76 is incorrect. The correct version is 0:0889x - y þ 61:4 ¼ 0.

DOI

Scopus
Intelligibility of Japanese accented segments of English

Pérez-Ramón, Rubén, Kondo, Mariko

Data Science in Collaboration 6 1 - 8 2022 [Invited]
Relationship between reaction time and nativeness rating

Perez-Ramon, Ruben, Mariko Kondo

Proceedings of the 35th General Meeting of the Phonetic Society of Japan 95 - 100 2021.09

Authorship：Last author
Predicting and classifying Japanese singleton and geminate consonants using logarithmic duration

Shigeaki Amano, Mariko Kondo, Kimiko Yamakawa

The Journal of the Acoustical Society of America 150 ( 3 ) 1830 - 1843 2021.09 [Refereed]

　View Summary

To clarify the acoustic variables for predicting and classifying Japanese singleton and geminate consonants, raw and logarithmic durations of the consonants and their related segments were examined using 12 minimal pair words that were pronounced in a carrier sentence at various speaking rates by 20 native Japanese speakers. Regression and discriminant analyses revealed that the logarithmic durations were better at predicting and classifying Japanese singleton and geminate consonants than the raw durations used in many previous studies. Specifically, the best acoustic variables were the logarithmic duration of the consonant's closure or frication and the logarithmic average duration of the mora in the preceding carrier phrase. These results suggest that logarithmic durations are relational invariant acoustic variables that can cope with the durational variations of singleton and geminate consonants in a wide range of speaking rates.

DOI

Scopus

1

Citation

(Scopus)
Mispronunciation of Japanese singleton and geminate stops by Korean and Taiwanese Mandarin speakers

Kimiko Yamakawa, Shigeaki Amano, Mariko Kondo

Acoustical Science and Technology 42 ( 2 ) 73 - 82 2021.03 [Refereed]

DOI

Scopus

3

Citation

(Scopus)
Phonetic fluency of Japanese learners of English: automatic vs native and non-native assessment

Mariko Kondo, Lionel Fontan, Maxime Le Coz, Takayuki Konishi, Sylvain Detey

Speech Prosody 2020 784 - 788 2020.05 [Refereed]

Authorship：Lead author

DOI
Control of foot-based English speech rhythm by Japanese speakers

Takayuki KONISHI, Mariko KONDO

21 - 25 2019.09
Logarithmic duration to predict and discriminate singleton and geminate consonants in Japanese

Amano Shigeaki, Yamakawa Kimiko, Kondo Mariko

Proceedings of the International Congress of Phonetic Sciences 2019 Paper No. 2960 - Paper No. 2960 2019.08 [Refereed]
Acoustic characteristics of Japanese short and long vowels: formant displacement effect revisited

Yazawa Kakeru, Kondo Mariko

Proceedings of the International Congress of Phonetic Sciences 2019 Paper No. 720 - Paper No. 720 2019.08 [Refereed]
Language-dependent cue weighting: An investigation of perception modes in L2 learning

Yazawa Kakeru, Whang James, Kondo Mariko, Escudero Paola

Journal of Second Language Research 1 - 25 2019.04 [Refereed]

DOI

Scopus

26

Citation

(Scopus)
Effects of phrase-final lengthening on English speakers’ manifestation of lexical accent in Japanese

Yazawa Kakeru, Kondo Mariko

Proceedings of GALA 2017: Language Acquisition and Development 469 - 482 2019.02 [Refereed]
The perception of Mandarin lexical tones by native speakers of Burmese

TSUKADA Kimiko, KONDO Mariko

Language and Speech 1 - 16 2018.10 [Refereed]

DOI

Scopus

17

Citation

(Scopus)
Fluency ratings of Japanese accented English by machine and native English speakers

KONDO Mariko, FONTAN Lionel, LE COZ Maxime, DETEY Sylvain, KONISHI Takayuki

Proceedings of the 32nd General Meeting of the Phonetic Society of Japan 279 - 284 2018.09
Perception of vowels in Japanese /Cju/ and /Cjo/ syllables by Chinese learners of Japanese

LIU Yili, REN Honghao, KONDO Mariko

Proceedings of the 32nd General Meeting of the Phonetic Society of Japan 243 - 248 2018.09
Acquisition of English high front vowels /iː, ɪ/ production by native Japanese speakers

YAZAWA Kakeru, KONISHI Takayuki, KONDO Mariko

Proceedings of the 32nd General Meeting of the Phonetic Society of Japan 173 - 178 2018.09
Phonetic characteristics of assessing L2 English Pronunciation by Native Japanese speakers

KONISHI Takayuki, KONDO Mariko

Proceedings of the 32nd General Meeting of the Phonetic Society of Japan 167 - 172 2018.09
Perception of Japanese Geminate Consonants by ChineseLearners of Japanese - Study of Mandarin Chinese Speakers

REN Honghao, LIU Yili, KONDO Mariko

Proceedings of the 32nd General Meeting of the Phonetic Society of Japan 102 - 107 2018.09
Variables for naturalness of Japanese spoken by non-native speakers

YAMAKAWA Kimiko, AMANO Shigeaki, KONDO Mariko

Proceedings of 2018 Autumn Meeting of the Acoustical Society of Japan 795 - 796 2018.09
Acquiring L2 phonemes and recognition of their allophonic variances

KONDO Mariko, KONISHI Takayuki

Proceedings of 9th Tutorial and Research Workshop on Experimental Linguistics 73 - 76 2018.08

DOI
Orthographic influence on L2 vowel quality: the case of English reduced vowels by native speakers of Japanese

Konishi Takayuki, Kondo Mariko

Proceedings of The English Linguistic Society of Japan 11th International Spring Forum 5 - 6 2018.05 [Refereed]
Cyborg Speech: Deep multilingual speech synthesis for generating segmental foreign accent with natural prosody

Henter, Gustav. Eje, Lorenzo-Trueba, Jaime, Wang, Xin, Kondo, Mariko, Yamagishi, Junichi

Proceedings of 2018 IEEE International Conference on Acoustics, Speech and Signal Processing 4011 - 4011 2018.04 [Refereed]
Relationship between speaking rate and devoicing ratio in words with singleton and geminate consonants

Amano, Shigeaki, Kondo, Mariko, Yamakawa, Kimiko

Proceedings of 2018 Spring Meeting of the Acoustical Society of Japan 2018 1269 - 1270 2018.03

J-GLOBAL
Acoustic Correlates of L2 English Stress – A Crosslinguistic Comparison between Japanese English and Korean English

KONISHI Takayuki, YUN Jihyeon, KONDO Mariko

Phonetics and Speech Sciences 10 ( 1 ) 9 - 14 2018.03 [Refereed]

DOI
L2 English speech rhythm of Japanese speakers: an alternative implementation of the Varco metrics

Ozaki, Yumi, Yazawa, Kakeru, Kondo, Mariko

Proceedings of Phonetics Teaching and Learning Conference 2017 84 - 88 2017.12 [Refereed]
Modelling Japanese speakers’ perceptual learning of English /iː/ and /ɪ/ within the L2LP framework

Yazawa, Kakeru, Kondo, Mariko, Paola Escudero

Proceedings of Phonetics Teaching and Learning Conference 2017 115 - 119 2017.12 [Refereed]
What we need to teach for better communication in English

KONDO Mariko, KONISHI Takayuki

Conference Handbook 35 ( 35 ) 232 - 237 2017.11 [Invited]
英語音声の評定における評定者の母語の影響

小西隆之, 近藤眞理子

第31回日本音声学会全国大会予稿集 138 - 141 2017.09
Asymmetrical interpretation of English liquid consonants by Japanese speakers

Mariko Kondo

The Journal of the Acoustical Society of America Vol. 140 ( No. 4, Pt. 2 of 2 ) 3283 - 3283 2016.11 [Refereed] [Invited]
Duration of Japanese singleton and geminate stops with devoiced vowel in various speaking rates.

Shigeaki Amano, Kimiko Yamakawa, Mariko Kondo

The Journal of the Acoustical Society of America Vol. 140 ( No. 4, Pt. 2 of 2 ) 3108 - 3108 2016.11 [Refereed]
Realization of downstep in English speakers' Japanese

Kakeru YAZAWA, Mariko KONDO

Proceedings of the 30th General Meeting of the PSJ, Special Issue of the Ninetieth Anniversary 120 - 125 2016.09
A study of inserted vowel duration in Japanese speakers' English

Takayuki KONISHI, Kakeru YAZAWA, Mariko KONDO

Proceedings of the 30th General Meeting of the PSJ - Special Issue of the Ninetieth Anniversary 70 - 75 2016.09
Asymmetry of English liquid recognition by Japanese speakers

Mariko KONDO

Proceedings of the 30th General Meeting of the PSJ - Special Issue of the Ninetieth Anniversary 38 - 43 2016.09
The perception of Mandarin lexical tones by native Japanese adult listeners with and without Mandarin learning experience

Kimiko Tsukada, Mariko Kondo, Kazuko Sunaoka

Journal of Second Language Pronunciation 2 ( 2 ) 225 - 252 2016.08 [Refereed]

DOI
Using intention transmission by voice quality and intonation for coating

Kondo Mariko

Coachint Clinic ( 2016年7月号 ) 20 - 23 2016.07 [Invited]
日本人英語学習者の挿入母音の持続時間長に関する研究 [Japanese advanced learners of English produce shorter epenthetic vowels]

Konishi Takayuki, Yazawa Kakeru, Kondo Mariko

Proceedings of the 30th General Meeting of the Phonetic Society of Japan 70 2016 [Refereed]
Educational environment with Japanese and overseas students - Environment where Japanese and overseas students study "in" English

Mariko Kondo

The Japan Association of Teaching Language and Culture 15 12 - 15 2015.11 [Invited]
Language Independent Automatic Pronunciation Scoring with Features Based on Dynamic Time Warping

Short, Greg, Kondo, Mariko

Proceedings of the joint conference of 2015 International Conference on Speech Database and Assessments and Conference on Asian spoken Language Research and Evaluation 245 - 249 2015.10 [Refereed]
Automatic recognition of Japanese vowel length accounting for speaking rate and motivated by perception analysis

Greg Short, Keikichi Hirose, Mariko Kondo, Nobuaki Minematsu

SPEECH COMMUNICATION 73 47 - 63 2015.10 [Refereed]

　View Summary

Automatic recognition of vowel length in Japanese has several applications in speech processing such as for computer assisted language learning (CALL) systems. Standard automatic speech recognition (ASR) systems make use of hidden Markov models (HMMs) to carry out the recognition. However, HMMs are not particularly well-suited for this problem since classification of vowel length is dependent on prosodic information, and since it is a relative feature affected by changes in the durations of surrounding sounds which vary in part due to changes in speaking rates. That being said, it is not obvious how to design an algorithm to account for these contextual dependencies, since there is still not enough known about how humans perceive the contrast. Therefore, in this paper, we conduct perceptual experiments to further understand the mechanism of human vowel length recognition. In our research, we found that the perceptual boundary is largely affected by the vowels two prior, one prior, and following the vowel for which the length is being recognized. Based on these results and the works of others, we propose an algorithm which does post-processing on alignments output by HMMs to automatically recognize vowel length. The method is primarily composed of two levels of processing dealing first with local dependencies and then long-term dependencies. We test several variations of this algorithm. The method we develop is shown to have superior recognition capabilities and be robust against speaking rate differences producing significant improvements. We test this method on three different databases: a speaking rate database, a native database, and a non-native database. (C) 2015 Elsevier B.V. All rights reserved.

DOI

Scopus

2

Citation

(Scopus)
Developmental Change in English Stress Manifestation by Japanese Speakers

Mariko Kondo

Proc. of the 18th International Congress of Phonetic Science 1029 2015.08 [Refereed]
Vowel epenthesis in Japanese speakers’ L2 English

Mariko Kondo

Proceedings of the 18th International Congress of Phonetic Science 0969 2015.08 [Refereed]
Segmental Variation of Japanese Speakers' English : Analysis of "the North Wind and the Sun" in AESOP Corpus(<Feature Article>Corpus-Based Data-Driven Speech Research in Asia)

KONDO Mariko, TSUBAKI Hajime, SAGISAKA Yoshinori

Journal of the Phonetic Society of Japan 19 ( 1 ) 3 - 17 2015.04 [Refereed] [Invited]

　View Summary

This paper describes the Asian English Speech cOrpus Project (AESOP), its aims, data collection platform, and auto-annotation method. It also describes the phonemic variation in Japanese speakers' reading of The North Wind and the Sun of the Corpus in relation to the English fluency levels of the Japanese speakers. The results showed that the main segmental difference in pronunciation between Japanese speakers and model native English speakers was vowels. Japanese speakers produced more variants of vowel phonemes; vowel reduction in unstressed syllables did not occur in most speakers' utterances. There was also an influence of Japanese syllable structure in Japanese speakers' English utterances; there were many instances of vowel epenthesis to break up consonant clusters, but there were very few examples of vowel deletion and consonant insertion.

DOI CiNii
Development of Japanese read-sentence database for non-native speakers of Japanese

Yamakawa, Kimiko, Amano, Shigeaki &amp, Kondo, Mariko

愛知淑徳大学論集—人間情報学部篇 ( 5 ) 9 - 14 2015.03
Extracting Speaker-Normalized Features with Sub-Neural Networks

Short, Greg, Kondo, Mariko

RISP International Workshop on Nonlinear Circuits, Communications, and Signal Processing 70 - 73 2015.02
Acoustic features of Japanese words spoken by Japanese natives and non-natives.

Kimiko Yamakawa, Shigeaki Amano, Mariko Kondo

Proc. of the 18th International Congress of Phonetic Science 0386 2015 [Refereed]
A study of the production of unstressed vowels by Japanese speakers of English using the J-AESOP corpus

Kakeru Yazawa, Yumi Ozaki, Greg Short, Mariko Kondo, Yoshinori Sagisaka

2015 INTERNATIONAL CONFERENCE ORIENTAL COCOSDA HELD JOINTLY WITH 2015 CONFERENCE ON ASIAN SPOKEN LANGUAGE RESEARCH AND EVALUATION (O-COCOSDA/CASLRE) 96 - 100 2015 [Refereed]

　View Summary

This study investigated the production of English unstressed vowels by Japanese speakers based on the J-AESOP corpus. Four acoustic features associated with unstressed vowels in English were examined: duration, intensity, fundamental frequency and vowel quality. Comparative analysis with native English speakers' production revealed that the Japanese speakers achieved good control of all the acoustic features except vowel quality, supporting the results of previous studies. Their attainment of nearnative control of duration, intensity and fundamental frequency can be attributed to positive L1 transfer from Japanese. As for vowel quality, the present study showed that the quality of the Japanese speakers' unstressed vowels was more peripheral than that of the native English speakers' because of the difficulty of L2 phoneme acquisition and the influence of orthography.

DOI

Scopus

4

Citation

(Scopus)
科学研究費助成事業研究成果報告書基盤研究(B) 22320081

近藤眞理子

2014.06
Building and Analysis of Asian English Speech Corpus: Japanese Speakers' Phonemic Recognition of English Consonants

Kondo, Mariko, Tsubaki, Hajime, Konishi, Takayuki, Sagisaka, Yoshinori

Learner Corpus Studies in Asia and the World Vol. 2 103 - 114 2014.05

DOI CiNii
A preliminary investigation of /CC/ clusters acquisition by Japanese learners of French using oral corpora: methodological insights

Detey, Sylvain, Kondo,Mariko, Racine,Isabelle, Kawaguchi,Yuji

Learner Corpus Studies in Asia and the World, Vol.2 215 - 225 2014.05

DOI CiNii
Time-domain characteristics of speech errors in single and geminate stops by non-native speakers of Japanese

Kimiko YAMAKAWA, Shigeaki AMANO, Mariko KONDO

Proc. Autumn Meeting Acoustical Society of Japan 299 - 300 2014.03
日本語母語話者の生成範疇境界による非日本語母語話者の促音・非促音の判別

天野成昭, 山川仁子, 近藤眞理子

日本音響学会講演論文集 2014 265 - 266 2014.03

J-GLOBAL
非日本語母語話者の促音・非促音の発音誤りにおける閉鎖区間および先行・後続モーラの時間的特徴

山川仁子, 天野成昭, 近藤眞理子

日本音響学会講演論文集 2014 267 - 268 2014.03

J-GLOBAL
DEVELOPMENT OF JAPANESE READ-WORD DATABASE FOR NON-NATIVE SPEAKERS OF JAPANESE

Kimiko Yamakawa, Shigeaki Amana, Mariko Kondo

2014 17TH ORIENTAL CHAPTER OF THE INTERNATIONAL COMMITTEE FOR THE CO-ORDINATION AND STANDARDIZATION OF SPEECH DATABASES AND ASSESSMENT TECHNIQUES (COCOSDA) 65 - 70 2014 [Refereed]

　View Summary

A Japanese read-word database was developed for 343 Japanese words spoken by 129 non-native speakers of Japanese (Korean, Chinese, Thai, Vietnamese, French, and English speakers) and 18 native speakers of Japanese. The Japanese words had a contrast of segments such as single/geminate stops, normal/lengthened vowels, existence/inexistence of moraic nasal, contracted sound/vowel lit, and voiced/voiceless consonants that non-native speakers of Japanese frequently mispronounce. The speech files of the Japanese words and phoneme labels for a part of the speech files were registered in the database. The database will contribute to scientific research on characteristics of Japanese speech by non-native speakers. It will also contribute to develop a computer aided learning system of Japanese speech for non-native speakers.
Vowel Epenthesis in Japanese Speakers’ English: Influence of First Language Syllable Structure in Second Language Production

Kondo, Mariko, Tsubaki, Hajime

Book of Abstract of Phonetics, Phonology, Languages in Contact – Contact Varieties, Multilingualism 18 - 20 2013.08
第二言語としての英語音声コーパスの構築と音声発話の分析

近藤眞理子

フランス語学研究 47 ( 47 ) 46 - 48 2013.06

CiNii
Analysis of Japanese learners' English mispronunciation characteristics aiming at their objective evaluation

Tsubaki, Hajime, Ogami, Takeru, Kondo, Mariko, Sagisaka,Yoshinori

Proceedings of the 11th International Conference on Computer Applications (ICCA) Session(8) Natural Language Processing and Speech Recognition 180 - 183 2013.02 [Refereed]
日本語話者の英語発話にみられる日本語の音節構造と母音の無声化との関係 — Japanese AESOPコーパスの分析から

Mariko Kondo

第三回コーパス日本語学ワークショップ予稿集 343 - 350 2013.02
アジア言語話者の英語発話コーパスの構築と研究への応用

近藤眞理子

Journal of the Phonetic Society of Japan 15 ( 2 ) 40 - 41 2012.08

CiNii
日本語音声コーパスにおける促音・非促音の判別

天野成昭, 山川仁子, 近藤眞理子

第一回コーパス日本語学ワークショップ予稿集 383 - 386 2012.03
日本語母語話者と中国語母語話者の日本語音声を区別する時間的変数

Shigeaki Amano, Kimiko Yamakawa, Mariko Kondo

日本音響学会春季研究発表会講演論文集 2012 409 - 410 2012.03

J-GLOBAL
日本語学習者の音声習得における第一言語特有の干渉と普遍言語的干渉—日本語教師へのアンケート調査から‐

近藤眞理子

2011年度早稲田大学大学院文学研究科紀要第57輯, 第3分冊, 21 - 34 2012.02

CiNii
Acoustic parameters to characterise speech rhythm of non-native Japanese learners

Amano Shigeaki, Kondo Mariko, Yamakawa Kimiko

INTERNATIONAL JOURNAL OF PSYCHOLOGY 47 127 2012 [Refereed]
FLUENCY AND L1 PHONOLOGY INTERFERENCE ON L2 ENGLISH - ANALYSIS OF JAPANESE AESOP CORPUS

Mariko Kondo, Hajime Tsubaki

2012 INTERNATIONAL CONFERENCE ON SPEECH DATABASE AND ASSESSMENTS IEEE Catalog Number CFP1208H-USB 123 - 128 2012 [Refereed]

　View Summary

Fifty Japanese speakers' read speech data of "the North Wind and the Sun" from the Japanese AESOP corpus was analyzed by automatic alignment using the HTK tool with a modified TIMIT dictionary. The results showed typical phonetic and phonological problems of English pronunciation by Japanese speakers which have been often discussed in EFL. The Japanese subjects' English fluency was evaluated by 8 English teachers, 3 native English and 5 Japanese speaking teachers. Typical EFL pronunciation problems were found more among lower level speakers and become less problematic for fluent speakers. However, some problems were found persistently, even among fluent speakers. The results also suggest that the automatic alignment we have adopted for our corpus analysis provide acceptable data, and that it should be possible to adopt it to analyze L2 English with other L1 Asian languages.

DOI

Scopus

2

Citation

(Scopus)
Effect of Pitch on Japanese Word-initial Stop Production by Korean Speakers

Takayuki Konishi, Mariko Kondo

Proceedings of the 17th International Congress of Phonetic Sciences 1134 - 1137 2011.08
Analysis of L2 English Speech Corpus by Automatic Phoneme Alignment

Hajime Tsubaki, Mariko Kondo

Proceedings of Speech and Language Technology in Education (SLaTE 2011) 2011.08
平成19〜21年度科学研究費補助金(基盤研究(C))研究成果報告書『第二言語の韻律習得の音響的考察とモデル化』

近藤眞理子

2010.05
Is Acquisition of L2 Phonemes Difficult? Production of English Stress by Japanese

Mariko Kondo

Proceedings of the 10th Generative Approaches to Second Language Acquisition Conference (GASLA 2009) 105 - 112 2009.10
Phoneme duration sensitivity in L2 adaptation in Japanese – Phonological Parsing Rules in Different Phonological Units

Mariko Kondo, Shigeko Shinohara

Proceedings of the Second International Conference on East Asian Linguistics, The Simon Fraser University Working Papers in Linguistics (http://www.sfu.ca/gradlings/SFUWPL/ICEAL2/Kondo_Shinohara.pdf 2009.08
Phonetic Aspects of Content Design in AESOP (Asian English Speech cOrpus Project)

Tanya Visceglia, Chiu-Yu Tseng, Mariko Kondo, Helen Meng, Yoshinori Sagisaka

ORIENTAL COCOSDA 2009 - INTERNATIONAL CONFERENCE ON SPEECH DATABASE AND ASSESSMENTS 60 - + 2009 [Refereed]

　View Summary

This research is part of the ongoing multinational collaboration "Asian English Speech cOrpus Project" (AESOP), whose aim is to build up an Asian English speech corpus representing the varieties of English spoken in Asia. AESOP is an international consortium of linguists, speech scientists, psychologists and educators from Japan, Taiwan, Hong Kong, China, Thailand, Indonesia and Mongolia. Its primary aim is to collect and compare Asian English speech corpora from the countries listed above in order to derive a set of core properties common to all varieties of Asian English, as well as to discover features that are particular to individual varieties. Each research team will use a common recording setup and share an experimental task set, and will develop a common, open-ended annotation system. Moreover, AESOP-collected corpora will be an open resource, available to the research community at large. The initial stage of the phonetics aspect of this project will be devoted to designing spoken-language tasks which will elicit production of a large range of English segmental and suprasegmental characteristics. These data will be used to generate a catalogue of acoustic characteristics particular to individual varieties of Asian English, which will then be compared with the data collected by other AESOP members in order to determine areas of overlap between L1 and L2 English as well as differences among varieties of Asian English.

DOI

Scopus

34

Citation

(Scopus)
Studying L2 Suprasegmental Features in Asian Englishes: A Position Paper

Helen Meng, Chiu-yu Tseng, Mariko Kondo, Alissa Harrison, Tanya Viscelgia

INTERSPEECH 2009: 10TH ANNUAL CONFERENCE OF THE INTERNATIONAL SPEECH COMMUNICATION ASSOCIATION 2009, VOLS 1-5 1683 - + 2009 [Refereed]

　View Summary

This position paper highlights the importance of suprasegmental training in secondary language (L2) acquisition. Suprasegmental features are manifested in terms of acoustic cues and convey important information about linguistic and information structures. Hence, L2 learners must harness appropriate suprasegmental productions for effective communication. However, this learning process is influenced by well-established perceptions of sounds and articulatory motions in the primary language (L1). We propose to design and collect a corpus to support systematic analysis of L2 suprasegmental features. We lay out a set of carefully selected textual environments that illustrate how suprasegmental features convey information including part-of-speech, syntax, focus, speech acts and semantics. We intend to use these textual environments for collecting speech data in a variety of Asian Englishes from non-native English speakers. Analyses of such corpora should lead to research findings that have important implications for language education, as well as speech technology development for computer-aided language learning (CALL) applications.
音韻論と音声学を結んで:Laboratory Phonology の動向と展望

近藤眞理子

日本言語学会第135回大会予稿集 2 - 11 2007.11
Acoustic Realization of Lexical Accent and its Effects onPhrase Intonation in English Speakers' Japanese

Mariko Kondo

Proceedings of the 16th International Congress of Phonetic Sciences Paper ID 1306 1649 - 1652 2007.08
平成16〜18年度科学研究費補助金(基盤研究(C))研究成果報告書『発話リズムの制御と近くにおける韻律単位の機能と役割の検証』

近藤眞理子

2007.06
Fundamental Frequency Control and Mora Duration in Japanese

Mariko Kondo

早稲田大学大学院文学研究科紀要 52 43 - 52 2007.03

CiNii
ゲンダイを読む第5回-言語コミュニケーションと感情の伝達

近藤眞理子

早稲田学報 2007年2月号 52 - 54 2007.02

Authorship：Lead author
Learning to Control L2 Prosody

Mariko Kondo

UCONN Occational papers in linguistics 4 - The Proceedings of the Inaugural Conference on Generative Approaches to Language Acquisition North America, Honolulu 1 183 - 193 2006.12
Acoustic Manipulation of Japanese prosody by English speakers

Mariko Kondo

International Workshop on the Auditory Processing of prosodic Features and its applications: Acquisition of Linguistic Organization and Human Audition, Honolulu, Hawaii http://www.cis.atr.jp/aloha-ws/documents/ForWeb_ALOHA_Abst-36MKondo_001.pdf 36 - 36 2006.11
Strategies for acquiring Japanese prosody by English speakers in Proceedings of Phonetics Teaching and Learning Conference 2005,

Mariko Kondo

Proceedings of Phonetics Teaching and Learning Conference 2005, ( pdf23 ) 1 - 4 2005.07
Moraic specification and phrase duration: Evidence from Japanese speakers’French

Mariko Kondo

早稲田大学大学院文学研究科紀要 49 ( 3 ) 65 - 80 2004.02

CiNii
Speech rhythm and consonant sequence production in Japanese

Mariko Kondo

The Proceedings of the 6th International Seminar on Speech Production, Macquarie Centre for Cognitive Science, Sydney, Australia 138 - 143 2003.12
Durational Evidence of the Psychological Reality of the Mora in Japanese speakers' French

Mariko Kondo, Shigeko Shinohara

Proceedings of the XVth International Congress of Phonetic Science, UAB, Spain 463 - 466 2003.08
The Acquisition Processes of Japanese Prosody by English Speakers

Mariko Kondo

Proceedings of the 6th Conference of Pan-Pacific Association of Applied Linguistics/PAAL 6 164 - 174 2001.12
Vowel Devoicing and Syllable Structure in Japanese

Mariko Kondo

Japanese Korean Linguistics/CSLI Publications & Stanford Linguistic Association 9 125 - 138 2000.12
Manifestation of Lexical Accent and Timing Strategy in English Speakers' Japanese

Mariko Kondo

Proceedings of the XIVth International Congress of Phonetic Science 2 1467 - 1470 1999.08
Heavy Syllables and Writing Errors

Mariko Kondo

Papers from the 1st Conference of the British Asssociation of Teaching Japanese as a Foreign Language/ The Japan Foundation Language Centre 1 31 - 40 1999.06
Use of Prosody for Acquisition of Japanese Mora-timing by English Speakers

Mariko Kondo

STiLL98-Speech Technology in Language Learning/The European Speech Communication Association and KTH 45 - 48 1998.05
Syllable Constraints on Vowel Duration and Intensity

Mariko Kondo

La Voyelle dans Tous ses Etats, Groupe Acoustique, Apprentissage et Interpretation, University of Nantes 32 - 37 1997.12
Mechanisms of Vowel Devoicing in Japanese

Mariko Kondo

The Department of Linguistics, The University of Edinburgh 1997.06
The Effect of Two Factors Related to Speaking Tempo on Vowel Devoicing in Japanese

Mariko Kondo

Proceedings of the 4th European Conference on Speech Communication and Techonology/ESCA 2 1311 - 1314 1995.09
Temporal Adjustment of Devoiced Morae in Japanese

Mariko Kondo

Proceedings of the XIIIth International Congress of Phonetic Sciences/ICPhS 3 238 - 241 1995.08
Mechanisms of Vowel Devoicing in Japanese

Mariko Kondo

Proceedings of 1994 International Conference on Spoken Language Processing/ICSLP 1 61 - 64 1994.09

CiNii
Is Vowel Devoicing part of the Vowel Weakening Process?

Mariko Kondo

Proceedings of the Edinburgh Linguistic Department Conference '94 55 - 62 1994.09

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Books and Other Publications

La prononciation de l'anglais contemporain dans le monde: variation et structure

Kawaguchi, Yuji, Yagashira, Norie, Kondo, Mariko, Detey, Sylvain, Kamiyama, Takeki, Tokita, Tomoko( Part： Joint translator)

Sanseido 2025
The corpus phonology of English : multifocal analyses of variation

Przewozny, Anne, Viollain, Cécile, Navarro, Sylvain(Asymmetric acquisition of English liquid consonants by Japanese speakers)

Edinburgh University Press 2020 ISBN: 9781474466998
言語の構造と分析 : 統語論, 音声学・音韻論, 形態論

西原, 哲雄, 福田, 稔, 中村, 浩一郎, 古川, 武史, 都田, 青子, 近藤, 眞理子(言語学), 長野, 明子

開拓社 2018.10 ISBN: 9784758913713
"Recognition of English Liquid Consonants by Japanese Speakers", in Nishihara, T., S. Tanaka, N. Hayase and T. Ono, (Eds.) "Frontiers of Modern Linguistic Theories"

KONDO Mariko( Part： Joint author)

Kaitakusha Publishing 2017.11 ISBN: 9784758918244
New Dictionary of English and Linguistic

Nakano Kouzou, Hattori Yoshihiro, Ono Takahiro, Nishihara Tetsuo( Part： Contributor)

Kaitaku-sha 2015.11 ISBN: 9784758922159
Allophonic Variation in Japanese Consonants and Problems of Second Language Production

Mariko Kondo( Part： Contributor)

Current Issues in Japanese Phonology: Segmental Variation in Japanese, van de Weijer, J. and Nishihara, T. (eds.), Kaitakusha 2013.01 ISBN: 9784758921800
Developmental and crosslinguistic perspectives in learner corpus research

Tono, Yukio, Kawaguchi, Yuji, Minegishi, Makoto( Part： Joint author, Design and Analysis of Asian English Speech Corpus - How to Elicit L1 Phonology in L2 English Data-)

John Benjamins Pub. Co. 2012 ISBN: 9789027207715
Phonological parsing of foreign sound sequences and the effect on speech rhythm

Mariko Kondo, Shigeko Shinohara( Part： Contributor)

Language and Language Processing, Peter Lang 2006.08 ISBN: 363155477X
Syllable Structure and its Acoustic Effects on Vowels in Devoicing Environments

Mariko Kondo( Part： Contributor)

Studies in Generative Grammar: Voicing in Japanese, Walter De Gruyter: Berlin/New York 2005.12 ISBN: 3110186004
Emotion and Intonation

Mariko Kondo( Part： Contributor)

Nakamura, Akira, Nomura, Masaaki, Sakuma, Mayumi & Komiya, Chizuko (Eds.) "Expression adn Style" , Meiji Shoin:Tokyo 2005.03 ISBN: 4625433266

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Presentations

The role of pitch contours in Vietnamese learners' perception of Japanese vowel lengths

Le Thi Huyen, Trang, Kondo, Mariko, Huang, Yixuan Huang

The 3rd International Conference on Tone and Intonation, Institute of Phonetics and Speech Processing

Presentation date： 2025.05

Event date：
2025.05

　

　
Discrimination and evaluation of accentedness in Japanese accented English

Pérez-Ramón, Rubén, Kondo, Mariko, Amand, Maelle

Accents 2024: Accents in various contexts, 17th International Conference on Native and Non-native Accents of English

Presentation date： 2024.12

Event date：
2024.12

　

　
Issues with model pronunciations for L2 English learners: features of different varieties of English

Kondo, Mariko

Annual research meeting of Institute of Language and Speech Sciences

Presentation date： 2024.11

Event date：
2024.11

　

　
Perception of Voicing Contrast of Japanese Word-Medial Plosives by Japanese and Chinese Listeners

Huang, Yixuan, Kondo, Mariko

The 5th International Symposium on Applied Phonetics

Presentation date： 2024.10

Event date：
2024.09

-

2024.10
Perception of Vietnamese nasal consonants by Japanese learners of Vietnamese

Trang, Le Thi Huyen, Kondo, Mariko

The 37th General Meeting of the Phonetic Society of Japan

Presentation date： 2023.09

Event date：
2023.09

　

　
The roles of VOT and f0 in identifying voicing contrasts of Japanese word-initial plosives: A comparative analysis of Japanese and Mandarin native speakers

Huang, Yixuan, Kondo, Mariko

The 37th General Meeting of the Phonetic Society of Japan, Phonetic Society of Japan

Presentation date： 2023.09

Event date：
2023.09

　

　
Logarithmic durations for classifying and predicting Japanese voiced and voiceless plosives

Yamakawa, Kimiko, Amano, Shigeaki, Kondo, Mariko

The 20th International Congress of Phonetic Sciences

Presentation date： 2023.08

Event date：
2023.08

　

　
Nativeness and intelligibility of Japanese accented English consonants by French Listeners

Perez-Ramon, Ruben, KONDO, Mariko, Detey, Sylvain, Fontan, Lionel, Amand, Maelle, Kamiyama, Takeki

The 20th International Congress of Phonetic Sciences

Presentation date： 2023.08

Event date：
2023.08

　

　
L2 proficiency predicts accentedness and comprehensibility

Yazawa, Kakeru, Pérez-Ramón, Rubén, Kondo, Mariko

The 20th International Congress of Phonetic Sciences

Presentation date： 2023.08

Event date：
2023.08

　

　
What features are important for effective L2 pronunciation? Phonetic and socio-cultural issues

Kondo, Mariko [Invited]

Waseda Brussels Workshop on Paralinguistic information and phonological acquisition in Japanese and some European languages: Tolerance of foreign accent in multilingual societies

Presentation date： 2023.07

Event date：
2023.07

　

　
Nativeness rating of Japanese accented vowels of English: a multi-task comparison

Perez-Ramon, Ruben, KONDO, Mariko

The 36th Annual Meeting of Japan Phonetic Society

Presentation date： 2022.09

Event date：
2022.09

　

　
Perception of segmental foreign accent by American and Japanese listeners: the case of Japanese accented /l/ and /r/

Perez-Ramon, Ruben, KONDO, Mariko

The 148th meeting of Acoustic Society of Japan (Autumn 2022)

Presentation date： 2022.09

Event date：
2022.09

　

　
A comparison of rhythm metrics for L2 speech

Yazawa, Kakeru, Kondo, Mariko

Speech Prosody 2022

Presentation date： 2022.05

Event date：
2022.05

　

　
Foreign accent self-awareness and intelligibility at the segmental level

Perez-Ramon, Ruben, KONDO, Mariko

The 10th International Symposium on the Acquisition of Second Language Speech (New Sounds 2022)

Presentation date： 2022.04

Event date：
2022.04

　

　
Intelligibility of Japanese accented segments of English”, Data Science in Collaboration

Perez-Ramon, Ruben, KONDO, Mariko [Invited]

Data Science in Collaboration

Presentation date： 2022.01

Event date：
2022.01

　

　
Relationship between reaction time and nativeness

Perez-Ramon, Ruben, KONDO, Mariko

The 35th Annual meeting of Japan Phonetic Society

Presentation date： 2021.09

Event date：
2021.09

　

　
Phonetic fluency of Japanese learners of English: automatic vs native and non-native assessment

Kondo, Mariko, Fontan, Lionel, Le Coz, Maxime, Konishi, Takayuki, Detey, Sylvain

10th International Conference on Speech Prosody

Presentation date： 2020.05

Event date：
2020.05

　

　
日本語母語話者の英語韻脚におけるリズム制御

小西隆之, 近藤眞理子

第33回音声学会全国大会

Presentation date： 2019.09

Event date：
2019.09

　

　
Building an ASR-free automatic tool for measuring the Speech Fluency of Japanese Learners of English

Lionel FONTAN, Maxime LECOZ, Mariko KONDO

New Sounds 2019 - International Symposium on the Acquisition of Second Language Speech (Waseda University)

Presentation date： 2019.08
Do Japanese learners use sufficient acoustic cues to manifest acceptable English stress?

Mariko KONDO, Lionel FONTAN, Maxime LE COZ, Sylvain DETEY, Takayuki KONISHI

New Sounds 2019－International Symposium on the Acquisition of Second Language Speech (Waseda University)

Presentation date： 2019.08
Acoustic characteristics of Japanese short and long vowels: formant displacement effect revisited

Yazawa, Kakeru, Kondo, Mariko

The International Congress of Phonetic Sciences 2019

Presentation date： 2019.08

Event date：
2019.08

　

　
Logarithmic duration to predict and discriminate singleton and geminate consonants in Japanese

Amano, Shigeaki, Yamakawa, Kimiko, Kondo, Mariko

The International Congress of Phonetic Sciences 2019

Presentation date： 2019.08

Event date：
2019.08

　

　
How English speakers control Japanese prosody

Mariko KONDO

2019 Research Seminar of Institute of Language and Speech Science, Waseda University (Waseda University) Institute of Language and Speech Science, Waseda University

Presentation date： 2019.05

Event date：
2019.05

　

　
Evaluation of Japanese accented English by native and non-native English speakers

Kondo, Mariko [Invited]

Jyvaskyla University, Finland (Jyvaskyla University, Finland) Jyvaskyla University, Finland

Presentation date： 2019.03

Event date：
2019.03

　

　
Teaching English pronunciation: features of Japanese learners and corpus-based research

Kondo, Mariko [Invited]

International Workshop on “Pronunciation teaching, corpora and automatic tools: English (France) Archean Labs & IRIT

Presentation date： 2019.03

Event date：
2019.03

　

　
英語母語話者と機械による自動評定に基づく日本語話者のL2 英語の流暢さの評価

近藤眞理子, Fontan Lionel, Le Coz Maxime, Detey Sylvain, 小西隆之

第32回日本音声学会全国大会

Presentation date： 2018.09

Event date：
2018.09

　

　
日本語母語話者による英語高前舌母音/iː, ɪ/の発話習得に関する研究

矢澤翔, 小西隆之, 近藤眞理子

第32回日本音声学会全国大会

Presentation date： 2018.09

Event date：
2018.09

　

　
日本語母語話者のL2 英語発音評価を構成する音声特性

小西隆之, 近藤眞理子

第32回日本音声学会全国大会

Presentation date： 2018.09

Event date：
2018.09

　

　
中国人日本語学習者による促音の知覚−中国語普通話話者を対象に−

任宏昊, 劉奕檪, 近藤眞理子

第32回日本音声学会全国大会

Presentation date： 2018.09

Event date：
2018.09

　

　
中国人日本語学習者による日本語の拗音/Cju/と/Cjo/の母音の知覚

劉奕檪, 任宏昊, 近藤眞理子

第32回日本音声学会全国大会

Presentation date： 2018.09

Event date：
2018.09

　

　
Variables for naturalness of Japanese spoken by non-native speakers

Yamakawa, Kuniko, Amano, Shigeaki, Kondo, Mariko

Presentation date： 2018.09

Event date：
2018.09

　

　
Acquiring L2 phonemes and recognition of their allophonic variances

Kondo, Mariko, Konishi, Takayuki

The 9th Tutorial and Research Workshop on Experimental Linguistics

Presentation date： 2018.08

Event date：
2018.08

　

　
Cyborg Speech: Deep multilingual speech synthesis for generating segmental foreign accent with natural prosody

Henter, Gustav Eje, Lorenzo-Trueba, Jaime, Wang, Xin, Kondo, Mariko, Yamagishi, Junichi

International Conference on Acoustics, Speech and Signal Processing

Presentation date： 2018.04

Event date：
2018.04

　

　
通じる英語のための発音教育

近藤眞理子 [Invited]

日本英語学会

Presentation date： 2017.11

Event date：
2017.11

　

　
Acoustic Correlates of L2 English Stress – A Crosslinguistic Comparison between Japanese English and Korean English

Konishi, Takayuki, Yun, Jihyeon, Kondo, Mariko

Seoul International Conferences on Speech Sciences 2017

Presentation date： 2017.11

Event date：
2017.11

　

　
英語音声の評定における評定者の母語の影響

小西隆之, 近藤眞理子

第31回日本音声学会全国大会

Presentation date： 2017.10

Event date：
2017.09

-

2017.10
Effects of phrase-final lengthening on English speakers’ manifestation of Japanese lexical accent

Yazawa, Kakeru, Kondo, Mariko

Generative Approaches to Language Acquisition

Presentation date： 2017.09

Event date：
2017.09

　

　
L2 English speech rhythm of Japanese speakers: an alternative implementation of the Varco metrics

Ozaki, Yumi, Yazawa, Kakeru, Kondo, Mariko

Phonetics Teaching and Learning Conference 2017

Presentation date： 2017.08

Event date：
2017.08

　

　
Modelling Japanese Speakers’ Perceptual Learning Of English /Iː/ And /ɪ/ Within The L2LP Framework

Yazawa, Kakeru, Kondo, Mariko, Paola Escudero

Phonetics Teaching and Learning Conference 2017

Presentation date： 2017.08

Event date：
2017.08

　

　
The perception of Mandarin lexical tones by non-native listeners from tonal language backgrounds

TSUKADA Kimiko, KONDO Mariko

The 19th Annual International Conference of Japanese Society for Language Sciences (Kyoto) Japanese Society for Language Sciences

Presentation date： 2017.07
Phonemic interpretation and phonetic manifestation of English liquid consonants by Japanese speakers

Kondo, Mariko

the 11th Phonology of Contemporary English Conference: Criation, Change and Spoken Corpora (PAC2015)

Presentation date： 2015.04
Acoustic manifestation of English prosody by Japanese learners

Kondo, Mariko

the 11th Phonology of Contemporary English Conference: Creation, Change and Spoken Corpora (PAC2015)

Presentation date： 2015.04
English liquids production by Japanese speakers reconsidered

Kondo, Mariko

International Workshop On Audio-Visual Affective Prosody In Social Interaction & Second Language Learning (AVAP 2015)

Presentation date： 2015.03

Event date：
2015.03

　

　
Extracting Speaker-Normalized Features with Sub-Neural Networks

RISP International Workshop on Nonlinear Circuits, Communications, and Signal Processing

Presentation date： 2015.02
Development of Japanese read-word database for non-native speakers of Japanese

Oriental COCOSDA 2014

Presentation date： 2014.09
Phonetic analysis of lexical stress and phrasal accent in Japanese accented English

International Workshop on Perception- Production Studies and Corpus-based Approaches in Second Language Phonetics and Phonology

Presentation date： 2014.07
A supra-segmental analysis of the production of Japanese geminate consonants by French native speakers

International Workshop on Perception- Production Studies and Corpus-based Approaches in Second Language Phonetics and Phonology

Presentation date： 2014.07
Looking at French and English pronunciation by Japanese learners using oral corpora: production and perception

International Workshop on Perception- Production Studies and Corpus-based Approaches in Second Language Phonetics and Phonology

Presentation date： 2014.07
Building and Analysis of Asian English Speech Corpus: Japanese Speakers' Phonemic Recognition of English Consonants

Learner Corpus Studies in Asia and the World 2014

Presentation date： 2014.05
A preliminary investigation of /CC/ clusters acquisition by Japanese learners of French using oral corpora: methodological insights

Learner Corpus Studies in Asia and the World 2014

Presentation date： 2014.05
日本語母語話者の生成範疇境界による非日本語母語話者の促音・非促音の判別

日本音響学会

Presentation date： 2014.03
日本語母語話者の生成範疇境界による非日本語母語話者の促音・非促音の判別

日本音響学会

Presentation date： 2014.03
The use of durational variables to characterize the rhythmic patterns of non-ﬂuent Japanese utterance by non-native speakers

Acoustical Society of America Fall 2013 Meeting San Francisco, CA

Presentation date： 2013.12
The use of durational variables to characterize the rhythmic patterns of non-ﬂuent Japanese utterance by non-native speakers

Acoustical Society of America Fall 2013 Meeting San Francisco, CA

Presentation date： 2013.12
AESOP-Waseda (Japan) 2013 status report

AESOP 2013 Workshop

Presentation date： 2013.11
Vowel Epenthesis in Japanese Speakers’ English: Influence of First Language Syllable Structure in Second Language Production

Phonetics, Phonology and Language in Contact, 2013 INTERSPEECH Satellite Workshop

Presentation date： 2013.08
Segmental and Prosodic Feature Transfer from L1 Japanese to L2 English:What You Can Learn from L2 English Corpu

Research Seminar of the Language and Speech Laboratory, Departamento de Filologia Inglesa y Aleman, Traduccion e Interpretacion, the Faculty of Letters, University of the Basque Country

Presentation date： 2013.03
First language allophonic variation and its effect on second language production and perception

Kondo, Mariko

International Workshop of Cross Cultural Resesarc on Speech Communication & Second Language Learning Processing, LABRI Amphitheatre, Universite de Bordeaux I, France

Presentation date： 2013.03
Relation between Japanese syllable structure and vowel devoicing in Japanese speakers' English utterances - Analysis from Japanese AESOP Corpus

The 3rd Corpus Japanese Language Workshop, NINJAL, TokyoThe 1st Corpus Japanese Language Workshop, NINJAL, Tokyo, 28 February - 1 March 2012

Presentation date： 2013.03
Analysis of Japanese learners' English mispronunciation characteristics aiming at their objective evaluation

11th International Conference on Computer Applications (ICCA), Yangon, Myanmar

Presentation date： 2013.02
Fluency and L1 Phonology Interference on L2 English - Analysis of Japanese AESOP Corpus

2012 International Conference on Speech Database and Assessments, University of Macau

Presentation date： 2012.12
ESOP data collection at Waseda 2012 and in Myanmar

AESOP 2012 Workshop at Chinese University of Hong Kong

Presentation date： 2012.12
Interphonologie et codage de corpus oraux non-natifs : m?・thodologie et voyelles d’apprenants japonais de FLE

La linguistique de corpus ?・ l’heure de la confrontation entre concepts, techniques et applications / Corpus Linguistics: How to bind concepts, technique and application?, Universit?・ Bordeaux III, France

Presentation date： 2012.12
Allophonic Variation of L1 Phonemes and L2 Phonemic Acquisition

2012 Waseda Workshop on Language And Speech Science (LASS)

Presentation date： 2012.10
Constructing Second Language English Speech Corpus and Analysis of Speech

2012 Japan French Language Society Meeting "Second Language Phonetics and PHonology and Speech Corpus: French and English, Atomi Women's University, Bunkyo Campus

Presentation date： 2012.07
Communication Reserach from Phonetic Study

Department of English Workshop, Graduate School of Foreign Language Studies, Daito Bunka University

Presentation date： 2012.06
Japanese Speakers’ English Pronunciation: Analysis of Japanese AESOP data

The 325th Regular Meeting of the Phonetic Society of Japan Symposium "Construction of a speech corpus of Asian speakers' English and its application to linguistic studies"

Presentation date： 2012.06
How to depict main characteristics of Asian Englishes

Seminar at Center for Humanities Information, Seoul National University

Presentation date： 2012.03
Durational parameters descriminating Japanese utterances of Japanese native speakers and Chinese speakers

The Acoustical Society of Japan 2012 Spring Meeting, Kanagawa University, Yokohama, 13-15 March 2012

Presentation date： 2012.03
Descrimination of geminate and non-geminate consonants in Japanese Speech Corpus

The 1st Corpus Japanese Language Workshop, NINJAL, Tokyo, 5-6 March 2012

Presentation date： 2012.03
Integrating non-native varieties in corpus-based English phonology: towards an InterPhonology of Contemporary English (ICE-PAC) project? Voices from Japan

PAC2012 The Phonology of Contemporary English : Variation and Change, The University of Toulouse II – Le Mirail, France, 29 February - 2 March 2012

Presentation date： 2012.02
Coderles voyelles nasales dans le corpus IPFC : reacute;sultats preacute;liminaires

PFC(Phonology of Contemporary French) 2011, Fondation Maison des Sciences de l’homme, Paris, France

Presentation date： 2011.12
Perception des voyelles /y-u/ dans IPFC: comparaisonentre productions natives, hispanophones et japonophones

PFC (Phonology of Contemporary French) 2011, Fondation Maison des Sciences de l’homme, Paris, France

Presentation date： 2011.12
AESOP data collection at Waseda 2011 and future plans

AESOP 2011 Workshop, Microelectronics and Information Systems Research Center, National Chiao Tung University, Hsinchu, Taiwan

Presentation date： 2011.10
2011Waseda Workshop on Language And Speech Science (LASS) and language education,

Reserach Workshop of 2011Waseda Workshop on Language And Speech Science (LASS) and Language education

Presentation date： 2011.10
Analysis of L2 English Speech Corpus by Automatic Phoneme Alignment

Speech and Language Technology in Education (SLaTE 2011), Venezia, Italy, 24-26 August, 2011

Presentation date： 2011.08
Effect of Pitch on Japanese Word-initial Stop Production by Korean Speakers

The XVIIth International Congress of Phonetic Sciences, Hong Kong, China, 17-21 August, 2011

Presentation date： 2011.08
Introducing AESOP Corpus

NINJAL Creation of Japanese Corpus Project Seminar

Presentation date： 2011.06
Constructiong Asian English Speech Corpus for Universl Purposes

PFC (Phonologie du francais contemporain) 2010

Presentation date： 2010.12
Report on ISCA-L2 2010 Workshop and AESOP data at Waseda

AESOP (Asian English Speech cOrpus Project) 2010 International Workshop

Presentation date： 2010.11
Current state of AESOP Corpus and Designing UniversallyReliable Corpus

2009 Research Seminar of Language and Speech Science Research Laboratories

Presentation date： 2010.10
L1 Prosody Interference on Acquisition of L2 Prosody

NINJAL Creation of Japanese Corpus Project Seminar

Presentation date： 2010.01
Constructing AESOP Corpus: EFL Based Approach

2009 Research Seminar of Language and Speech Science Research Laboratories

Presentation date： 2009.10
Studying L2 Suprasegmental Features in Asian Englishes: A Position Paper

2009 INTERSPEECH, Brighton, UK

Presentation date： 2009.09
AESOP Corpora Design for Japanese Speakers

AESOP (Asian English Speech cOrpus Project) 2009 International Workshop

Presentation date： 2009.08
Phonetic Aspects of Content Design in AESOP (Asian English Speech cOrpus Project)

The 12th conference of Oriental Chapter of the International Committee for the Co-ordination and Standardization of Speech Databases and Assessment Techniques

Presentation date： 2009.08
Design of English Speech Corpus for AESOP – progress to date

Seminar of Sagisaka Lab, GITI, Waseda University

Presentation date： 2009.04
Design of English Speech Corpus for AESOP – progress to date

Seminar of Sagisaka Lab, GITI, Waseda University

Presentation date： 2009.04
What does lexical stress mean for Japanese speakers? : acoustic study of their English vowel production

10th Generative Approaches to Second Language Acquisition, University of Illinois at Urbana-Champaign

Presentation date： 2009.03
Phonological rules and phonetic data - you can see the truth from phonetic data

Study Seminar of Phonetic Laboratory, Sophia University

Presentation date： 2009.01
Phoneme duration sensitivity in L2 adaptation in Japanese – Phonological Parsing Rules in Different Phonological Units

The Second International Conference on East Asian Linguistics, Vancouver, British Columbia, Canada

Presentation date： 2008.11
Phoneme duration sensitivity in L2 adaptation in Japanese – Phonological Parsing Rules in Different Phonological Units

The Second International Conference on East Asian Linguistics, Vancouver, British Columbia, Canada

Presentation date： 2008.11
What does English lexical accent mean for Japanese speakers?

The 2nd International Workshop on Language and Speech Science, Waseda University, Japan

Presentation date： 2008.09
Phonological adaptation and production of second language

Linguistic Seminar, School of English, Media Studies and Art History, University of Queensland, Australia

Presentation date： 2008.05
Phonetic-Phonology Interface: current situation and the future prospect of Laboratory Phonology

The 135th meeting of the Linguistic Society of Japan

Presentation date： 2007.11
Acoustic Realization of Lexical Accent and its Effects on Phrase Intonation in English Speakers' Japanese

The XVIth International Congress of Phonetic Sciences

Presentation date： 2007.08
Speech Rhythm or F0? - Japanese Prosody Control by English Speakers

Linguistic Colloquy, Department of Linguistics, University of Kansas

Presentation date： 2007.03
Acoustic Manipulation of Japanese prosody by English speakers

International Workshop on the Auditory Processing of prosodic Features and its applications: Acquisition of Linguistic Organization and Human Audition, Honolulu, Hawaii

Presentation date： 2006.11
Strategies for acquiring Japanese prosody by English speakers

Phonetics Teaching and Learning Conference, University College London

Presentation date： 2005.07
Phonological Parsing and Timing Control by Japanese Speakers’

Generative Approaches to Language Acquisition North America 2004

Presentation date： 2004.12
Learning to Control L2 Prosody

Generative Approaches to Language Acquisition North America 2004

Presentation date： 2004.12
Strategies for Controlling Speech Rhythm: the Case of English Speakers of Japanese

The 14th European Second Language Association

Presentation date： 2004.09
Speech rhythm and consonant sequence production in Japanese

The 6th International Seminar on Speech Production, Macquarie Centre for Cognitive Science, Sydney, Australia

Presentation date： 2003.12
Phonological parsing of foreign sound sequences and the effect on speech rhythm

The 38th Linguistics Colloquium, Piliscsaba, Hungary

Presentation date： 2003.08
Durational evidence of the psychological reality of the mora in Japanese speakers’French

The XVth International Congress of Phonetic Science, Barcelona, Spain

Presentation date： 2003.08
Psychological Reality of the Mora in Japanese Speakers' French

AILA 2002, 13th World Congress of Applied Lingustics

Presentation date： 2002.12
The Acquisition Processes of Japanese Prosody by English Speakers

The 6th Pan-Pacific Association of Applied Linguistics, Cheju University, South Korea

Presentation date： 2001.08
英語話者による日本語のリズムの習得

2001年度日本第二言語習得学会年次大会、大東文化会館

Presentation date： 2001.05
母音の無声化の音声的要因

早稲田大学語学教育研究所言語理論研究会

Presentation date： 2001.01
Evidence of Stress Foot in English Speakers' Japanese

Generative Approaches to Language Acquisition '99, Potsdam, Germany

Presentation date： 1999.09
Syllable Weight and Syllable Structure in Japanese

The 9th Japanese/Korean Linguistic Conference, The Ohio State University, USA

Presentation date： 1999.08
Manifestation of Lexical Accent and Timing Strategy in English Speakers' Japanese

The XIVth International Congress of Phonetic Sciences, San Francisco, USA

Presentation date： 1999.08
Heavy Syllables and Writing Errors

The 1st Conference of the British Asssociation of Teaching Japanese as a Foreign Language, London, UK

Presentation date： 1998.09
Use of Prosody for Acquisition of Japanese Mora-timing by English Speakers'

The European Speech Communication Workshop: Speech Technology in Language Learning, Marholmen, Sweden

Presentation date： 1998.05
Syllable Constraints on Vowel Duration and Intensity

Linguistic Studies Workshop: Vowels of All Shapes, Kinds and Sizes, Nantes, France

Presentation date： 1997.12
The Effect of Two Factors Related to Speaking Tempo on Vowel Devoicing in Japanese

The 4th European Conference on Speech Communication and Technology, Madrid, Spain

Presentation date： 1995.09
Temporal Adjustment of Devoiced Morae in Japanese

The XIIIth International Congress of Phonetic Sciences, Stockholm, Sweden

Presentation date： 1995.08
Vowel Weakening and Vowel Devoicing in Satndard Japanese

The Autumn Meeting of the Linguistic Association of Breat Britain, Middlesex University, UK

Presentation date： 1994.09
Mechanisms of Vowel Devoicing in Japanese

1994 international Conference on Spoken Language Processing, Yokohama, Japan

Presentation date： 1994.09
Durational Compensation fo Segments within a Mora in Japanese

The Spring Meeting of the Linguistic Association of Great Britain, The University of Salford, UK

Presentation date： 1994.04
Effect of Blocking Factors and Constraints on Consecutive Vowel Devoicing in Standard Japanese

The 4th Conference on Laboratory Phonology, Oxford, UK

Presentation date： 1993.08
Constraints on Voiceless Vowels in Japanese

The Edinburgh Linguistics Department Conference '93

Presentation date： 1993.05
Factors Affecting Voiceless Vowels in Japanese

The Edinburgh Linguistics Department Conference '92

Presentation date： 1992.05
Cross-language Study of Voiceless Vowels

The Edinburgh Linguistics Department Conference '91

Presentation date： 1991.05

▼display all

Research Projects

Phonetic evaluation of foreign accents and comparing their social acceptability in Japan and USA

Japan Promotion of Science Grants-in-Aid for Scientific Research

Project Year :

2024.06

-

2027.03

Kondo, Mariko
The validity and universality of acoustic features of phonemes using logarithmic time

Japan Society for the Promotion of Science Grant-in-Aid for Scientific Research (B)

Project Year :

2023.04

-

2027.03

Kimiko Yamakawa, Mariko Kondo, Shigeaki Amano, Ryoko Hayashi
From corpus to target data as steps for automatic assessment of L2 speech: L2 French phonological lexicon of Japanese learners

Project Year :

2020.04

-

2025.03
Mechanisms for comprehending different English accents: focus on Asian and African varieties

Japan Society for the Promotion of Science Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)

Project Year :

2021.04

-

2025.03

Mariko Kondo, Detay Sylvain, Kakeru Yazawa, Miki Ikoma, Shigeaki Amano, Takayuki Konishi, Perez Ramon Ruben
Development of high-performance loudspeaker technology based on the understanding of the production and perception of pop-out voices

Kakenhi

Project Year :

2020.04

-

2024.03
Developing L2 automatic pronunciation evaluation and pronunciation learning-support systems for effective speech communication

Japan Society for the Promotion of Science Grants‐in‐aid for Scientific Research

Project Year :

2019.07

-

2024.03

Mariko Kondo, Sylvain Detey, Takayuki Konishi, Ruben Perez Ramon
英語における日本語訛の強度と発話理解度の検証：母語の異なる英語ユーザーによる判定

日本学術振興会科学研究費助成事業

Project Year :

2020.09

-

2023.03

近藤眞理子, PEREZ RAMON RUBEN
英語における日本語訛の強度と発話理解度の検証：母語の異なる英語ユーザーによる判定

日本学術振興会科学研究費助成事業

Project Year :

2020.07

-

2023.03

近藤眞理子, PEREZ RAMON RUBEN
Identifying boundary between intelligible and unintelligible Japanese accented English

JSPS Kakenhi

Project Year :

2020.11

-

2023.03

Mariko Kondo, Ruben PEREZ RAMON
英語における日本語訛の強度と発話理解度の検証：母語の異なる英語ユーザーによる判定

日本学術振興会科学研究費助成事業

Project Year :

2020.04

-

2022.03

近藤眞理子, PEREZ RAMON RUBEN
A corpus-based multi-level analysis of spoken French produced by pre-advanced Japanese learners of French

Japan Society for the Promotion of Science Grants-in-Aid for Scientific Research

Project Year :

2015.04

-

2019.03

DETEYS Sylvain, Barcat Corentin, Fontan Lionel, Coz Maxime Le

　View Summary

The current project aimed at furthering our knowledge of Japanese-French interlanguage development by building a corpus of spoken French produced by pre-advanced Japanese learners of French and annotating the data at several levels of analysis. The underlying research objective was to provide a first overview of the divergences that remain in the spontaneous speech of pre-advanced Japanese learners using a basic annotation procedure.
41 learners were recorded in four universities, out of which 17 were recorded a second time after one year for longitudinal purposes. A total of 25 hours and 30 minutes (214’278 words) of spontaneous speech were orthographically transcribed, aligned, and manually annotated with ad hoc conventions, resulting in 75’873 annotations. The data has been loaded to a dedicated server with an ad hoc data mining tool to search the corpus. Our annotated corpus will be useful to prioritize teaching topics to avoid lingering divergences at such level of learning.
A corpus-based multi-level analysis of spoken French produced by pre-advanced Japanese learners of French

Japan Society for the Promotion of Science Grant-in-Aid for Scientific Research

Project Year :

2015.04

-

2019.03

Sylvain Detey, Mairko Kondo, Yuji Kawaguchi

　View Summary

The current project aimed at furthering our knowledge of Japanese-French interlanguage development by building a corpus of spoken French produced by pre-advanced Japanese learners of French and annotating the data at several levels of analysis. The underlying research objective was to provide a first overview of the divergences that remain in the spontaneous speech of pre-advanced Japanese learners using a basic annotation procedure.41 learners were recorded in four universities, out of which 17 were recorded a second time after one year for longitudinal purposes. A total of 25 hours and 30 minutes (214’278 words) of spontaneous speech were orthographically transcribed, aligned, and manually annotated with ad hoc conventions, resulting in 75’873 annotations. The data has been loaded to a dedicated server with an ad hoc data mining tool to search the corpus. Our annotated corpus will be useful to prioritize teaching topics to avoid lingering divergences at such level of learning
Comparing the comprehensiveness of English speech with the degree of Japanese accent using synthesized Japanese-English bilingual speech

Japan Society for the Promotion of Science Grant-in-Aid for Scientific Research

Project Year :

2015.04

-

2019.03

Mariko Kondo, Junichi Yamagishi

　View Summary

Japanese accented English pronunciation was studied in terms of speech communication by native and non-native English speakers. The focus of the study is to examine if Japanese accented English is easily understood by other language speakers and whether the necessary information is conveyed to listeners. First, acoustic details of Japanese accented English were examined using a large-scale speech corpus. Based on these findings, Japanese accented English was synthesized by changing the degree of Japanese accentedness of some English phonemes using the Cyborg speech synthesis system, developed based on deep-learning-based speech synthesis. Then perception tests were performed to investigate segmental accuracy and Japanese accentedness. We found that assessors’ first language had little effect on the comprehension of the Japanese accented English. The results suggest that new pronunciation teaching systems need to be developed that focus on improving segmental accuracy
Factors in phoneme perception and production boundaries in Japanese

Japan Society for the Promotion of Science Grant-in-Aid for Scientific Research

Project Year :

2013.04

-

2018.03

Shigeaki Amano, Mariko Kondo, Kimiko Yamakawa

　View Summary

To contribute to Japanese speech education, speech technology, and speech medicine, speech perception and production were studied about a geminate phoneme and a fricative/affricate phoneme using Japanese native- and nonnative-speakers. It was revealed that perception and production boundaries are affected by native language, speech rate, and devoicing, and the boundaries can be represented by an equation with variables of acoustic features of speech. It was also revealed that the boundaries almost coincide
他言語・多目的対応のＣＡＬＬシステムの開発

日本学術振興会科学研究費助成事業

Project Year :

2014.04

-

2016.03

近藤眞理子, SHORT GREGORY, SHORT Gregory

　View Summary

本研究費を受け、この２年間でCALL(Computer Assisted Language Learning)技術を高めるために、(1) 日本語の発話速度のデータベースの作成と(2) 外国語発音向上のためのシステム開発の研究を行った。特に発音向上のためのシステム開発の研究は、発音向上という目的だけでなく、音声学や音声工学などの基礎科学、また外国語音声教育などへの応用研究に貢献できるものである。
まず、(1)の日本語の発話速度のデータベース（Jasper）は、日本語母語話者が無意味語をゆっくり、普通、速いの三つの異なる速度で発話したものを収録したものである。このデータベースは日本語の母音の長短、促音、撥音などの特殊拍の長さが、発話速度によりどう変化しているかの研究には不可欠なもので、特殊拍と発話リズムの研究に役立つように構築してある。また既存のデータベースと合わせて、構築したJasperを使い、日本語話者の知覚実験を行い、母音長の知覚には、母音そのものの長さよりも２モーラ前から１モーラ後ろに出現する母音長が大きく影響を与えていることを示した。この結果を元に、日本語話者が異なる発話速度において、どのように母音長を知覚するかを解析した。
(2)の外国語学習のためのシステム開発に向けての研究は、まずニューラル・ネットワークを用い、言語学習者の発話の音声波形を元に、異なる話者個人個人の発話特徴ではなく、様々な話者共通の音声特徴 (features) を抽出する方法を提唱した。発話音声は、言語音声情報だけでなく、話者の身長・体重・性別・年齢などの言語外的要因の影響も受けるため、話者共通の音声特徴の抽出は簡単ではないが、この話者共通の音声特徴を使い、学習言語にとらわれない、多言語に対応した学習者の発音判定のためのアルゴリズムを考案した。
Efficient and Painless CALL System Development

Japan Society for the Promotion of Science The Grant-in-Aid for JSPS Fellows relating to JSPS Postdoctoral Fellowship for Foreign Researchers

Project Year :

2014.04

-

2016.03

Mariko Kondo, Gregory Shor
Quantitative analysis and the modeling of L2 timing control through the comparison with L1 timing characteristics

Grant-in-Aid for Scientific Research

Project Year :

2011.04

-

2016.03

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Speech generation and perception characteristics have been quantitatively analyzed using the second language (L2) speech data aiming at scientific understanding of them and their applications to L2 education. Using Asian L2 English speech corpus, timing control differences between natives and learners were quantitatively analyzed at Inter Stress Intervals defined as the durations between succeeding stressed syllables. Moreover, by analyzing L2 speech data with Japanese geminate/singleton consonants, neighboring segmental loudness effect on segmental duration perception has been commonly observed in speakers with different L1s. In addition, control differences between Japanese mora-timing and Chinese syllable-timing has been clearly observed in L2 Japanese speech. An experimental L2 speech timing training by enforcing Japanese mora-timing showed the remarkable improvements of L2 learners in the contrastive generation of Japanese geminate/singleton consonants
A corpus-based longitudinal study of the interphonological features of Japanese learners of French

Japan Society for the Promotion of Science Grant-in-Aid for Scientific Research

Project Year :

2011.04

-

2015.03

Sylvain Detey, Mariko Kondo, Yuji Kawaguchi

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Our project was aiming at carrying out a corpus-based perception-production longitudinal study of the interphonological features of Japanese learners of French, which could help both researchers in the field of L2 phonology acquisition and language educators trying to help Japanese learners of French improve their pronunciation. The linguistic focus of the study was essentially 4 sets of segmental contrasts (nasal vowels, liquid consonants /r/ vs /l/, labial consonants /b/ vs /v/ and high rounded vowels /y/ vs /u/) as well as consonantal clusters at the syllabic level.This has been achieved in three ways (perception protocol; production protocol; tools for analysis) and tested with data collected over two years in four sessions with beginner Japanese learners of French. In the end, we managed to obtain the whole dataset for 12 subjects, with a total of 27’216 perceptually coded units in Textgrids files
Analysing the Influence of first language prosodic features on speech production and perception of Japanese language learners

Japan Society for the Promotion of Science Grants‐in‐aid for Scientific Research

Project Year :

2010.04

-

2014.03

Mariko Kondo, Shigeaki Amano, Kuniko Yamakawa

　View Summary

This study investigated speech rhythm produced by native and non-native Japanese speakers, using durational variables which are used to categorize languages by their speech rhythm. We collected Japanese read speech data of native speakers of Chinese, Vietnamese, Korean and French. We have accumulated 343 Japanese words containing tokushu-haku, which are geminate consonants, moraic nasals, long vowels, /CjV/ sequences, and devoiced vowels. The speakers' Japanese utterances were segmented and analyzed by durational variables: (1) durational ratios, (2) standard deviation, (3) coefficient of variation, (4) pairwise variability index, and (5) average of normalized voice onset asynchrony.The analyses of these durational variables showed that individual variables were not effective enough to differentiate between native and non-native Japanese speakers' speech rhythm. At least two or often more than three variables were required to discriminate between the native and non-native groups
Acoustic Examination of Acquisition of Second Language Prosody and Modeling of Second Language Prosody Acquisition

Japan Society for the Promotion of Science Grant-in-Aid for Scientific Research (C)

Project Year :

2007.04

-

2010.03

Mariko Kondo

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This study investigated acquisition of second language prosody between Japanese and English. In Japanese speakers' English utterances, most Japanese speakers did not reduce vowels in unstressed syllables. However, for English speakers' utterances in Japanese there was a tendency for accented vowels to be longer as well as higher pitched. English speakers also showed a clear tendency to use word accents in a phrase, which caused downstep. This phrase intonation was distinctly different from Japanese phrase intonation by native Japanese speakers ; especially when a phrase consisted of all non-accented words whose phrase intonation simply showed natural declination
The Role of Phonological Units in Perception and Their Effects on the Control of Speech Rhythm

Japan Society for the Promotion of Science Grant-in-Aid for Scientific Research (C)

Project Year :

2004.04

-

2007.03

Mariko Kondo

　View Summary

This study investigated to what extent the timing organisation of a first language influences the production of a second language, in particular the timing compensation phenomenon as a tool for analysis of rhythmic organisation. The study mainly examined the relationship between moraic parsing of French sound sequences by Japanese speakers and their speech timing control at different levels of prosodic units. Previous phonetic studies show that the mora is the basic unit of speech timing in Japanese, whereas in French the duration of a phrase is dependent on the number of syllables. Durational data from sets of French phrases consisting of the same number of syllables spoken by Japanese and French speakers were examined.The results found that Japanese speakers clearly showed mora-based timing control in syllables ; phonologically bimoraic French syllables, as perceived by Japanese listeners, were significantly longer than mono-moraic syllables. The results indicated that : 1) Japanese speakers parse foreign sound sequences into a Japanese speech unit, i.e. the mora ; and 2) in production they use the mora rather than the syllable for durational control of French when they speak French. However, the effect of the mora on phrase level timing control was less clear, although there was a tendency in Japanese speakers' French utterances for phrase durations to be proportional to their mora count. The results suggest that timing control in larger prosodic units, such as at the phrase level, is easier to control for Japanese speakers even after they have acquired mora-based timing control. The timing compensation effects probably appear on different levels in different language groups, especially a first and second languages

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Misc

撥音と鼻子音の生成範疇境界を表す変数

天野成昭, 山川仁子, 近藤眞理子

日本音響学会研究発表会講演論文集(CD-ROM) 2019 2019

J-GLOBAL
非日本語母語話者が発声した日本語音声の自然性に関わる音響特徴

山川仁子, 天野成昭, 近藤眞理子

日本音響学会研究発表会講演論文集(CD-ROM) 2016 2016

J-GLOBAL
母音の無声化を伴う促音・非促音の時間的特徴

天野成昭, 山川仁子, 近藤眞理子

日本音響学会研究発表会講演論文集(CD-ROM) 2016 2016

J-GLOBAL
Naturalness Evaluation of Japanese Words Spoken by Non-native Speakers

Kimiko YAMAKAWA, Shigeaki AMANO, Mariko KONDO

Proceedings of the auditory research meeting 45 ( 9 ) 709 - 714 2015.12

CiNii

Syllabus

Directed Research: International Communications and Culture S (Speech Communication and Language Acquisition)

Graduate School of International Culture and Communication Studies

2025 spring semester
International Communications and Culture II F (Speech Communication and Language Acquisition)

Graduate School of International Culture and Communication Studies

2025 fall semester
International Communications and Culture II S (Speech Communication and Language Acquisition)

Graduate School of International Culture and Communication Studies

2025 spring semester
Directed Research: International Communications and Culture F (Speech Communication and Language Acquisition)

Graduate School of International Culture and Communication Studies

2025 fall semester
International Communications and Culture I F (Speech Communication and Language Acquisition)

Graduate School of International Culture and Communication Studies

2025 fall semester
International Communications and Culture I S (Speech Communication and Language Acquisition)

Graduate School of International Culture and Communication Studies

2025 spring semester
Acoustics and Auditory Phonetics

School of International Liberal Studies

2025 spring semester
Seminar on Communication 57

School of International Liberal Studies

2025 fall semester
Seminar on Communication 07

School of International Liberal Studies

2025 spring semester
English Phonetics and Phonology 01

School of International Liberal Studies

2025 spring semester

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Social Activities

Super Global High School Administrative Guidance Committee of Urawa Ichijo High School

Saitama Prefecture Education Department
2016.04

-

2021.03

Overseas Activities

L2アクセントの強度と発話理解度の研究：複数L1-L2間の分節音の知覚の相互干渉の検証

2022.09

-

2023.09

スペイン Universidad del Pais Vasco

フランス Institut de Linguistique et phonetique generals et appliquees
韻律単位の認識と発話リズム制御との関係と、音声自動認識装置への応用

2007.10

-

2009.03

オーストラリア Macquarie　Univ.

Sub-affiliation

Faculty of International Research and Education Graduate School of International Culture and Communication Studies
Affiliated organization Global Education Center

Research Institute

2023

-

2028

Institute of Language and Speech Science Director of Research Institute

Internal Special Research Projects

英語学習による日本語の調音への影響と音声認識の変化

2021

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  今年度は、発話リズムの習得が外国語の音声認識に与える影響を調査するために、日本語母語話者の英語発話を、発話リズムの指標であるglobal metricsとpairwise metricsを用いて、発話リズムの分析を行った。　英語習熟度の低い話者は、言いよどみなどが多く発話速度が遅いことから、分節音の平均継続時間を使って話速の正規化を行った結果、global metricsの指標が英語習熟度と高い相関を示すことが明らかとなった。これらの結果をもとに、英語習熟度と英語圏滞在歴を変数とし、日本語音声発話リズムの変化と日本語の分節音の調音の変化に相関がみられるかどうか、検証していく予定である。
非母語話者間の効果的音声コミュニケーションのための英語音声自動評価システムの開発

2019 DETEY Sylvain, 小西隆之, FONTAN Lionel, LE COZ Maxime

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日本語訛の英語の流暢さの自動評価システムを構築するために、まず人による評価を行い、それを基に自動評価システムを構築した。この評価システムを使って、別の日本語訛の英語音声の自動評価を行い、人間による評価と機械による評価を比較検証した。日本語話者と英語話者の英語発話を、英語話者が”流暢さ”の評定をし、その評定結果を元に流暢さの自動判定システムを構築した。この自動判定システムによる別の日本語訛の英語の評定値を、異なる16名の評定値との比較したところ、まあまあ高い相関を得られた(r=0.65)。これらの結果から、今回構築した自動判定システムの日本語訛の英語の流暢さの評価は、ある程度信頼度が高いといえる。
第二言語から第三言語への音声習得のメカニズムの研究

2018 小西隆之, DETEY Sylvain

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As a first step to investigating third language acquisition, I investigated acquisition of different accents of a second language (L2). I investigated whether subjects could acquire L2 phonemes in two different L2 accents, even though they had only been trained how to discriminate L2 phonemes in one of the L2 accents. Such tests help to understand if learners can extend their knowledge of L2 phonemes to third+ languages. The test focused on English liquid consonant acquisition by native Japanese speakers. Liquid consonants in English have different varieties depending on accent: varying from (post) alveolar approximant or retroflex (e.g. American English) ~ tap or flap (e.g. Scottish English). We first taught American English varieties of liquid consonants /l/ and /r/ to the native Japanese speakers, focusing on the articulation of /r/ which is an approximant produced with lip rounding. After five weeks training, they became able to discriminate American English /l/ and /r/. However, when we then tested their liquid discrimination ability of Scottish accent (Scottish tap is different from American English /r/), we found that their discrimination of Scottish English /l/ and /r/ was not very good. Therefore, training with American accent did not improve their discrimination ability of a different (Scottish tap) accent. 
第二言語で習得された新しい範疇の音の第三言語音声習得における役割

2017 小西隆之, 矢澤翔

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　本研究では、”第二言語(L2)の音は第一言語(L1)の音素の調音から離れているほうが違いが際立ち、知覚されやすく、習得されやすい”というL2音声習得モデル理論を元に、アメリカ英語（L2）の/r/の習得が、/r/の調音が異なるスコットランド英語(第三言語)の/r/と/l/の知覚に影響を及ぼすかを検証した。日本語にはない円唇と舌の引き込みを伴うアメリカ英語の/r/（歯茎接近音）の訓練を受けた被験者グループと、訓練を受けないグループの/r/と/l/の知覚を比較したところ、訓練を受けたグループは、アメリカ英語の/r/の知覚能力が高くなったが、スコットランド英語のたたき音の/r/の知覚能力には影響せず、むしろ/l/に対する識別力が高くなった。　
バイリンガル音声合成を用いた英語の日本語訛の強度と発話理解度の判定

2016 小西隆行

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日本語話者にとって英語の/l/と/r/がどのように聞こえているかを、/l/と/r/の割合を/r/100%から/l/100%まで変化させた英語音声と英語訛のある日本語音声を用い、日本語話者が英語らしいと感じる発音はどのようなものかを検証した。その結果、/l/の代わりに典型的な英語の/r/の音である後部歯茎接近音または反り舌音を多用した発話(80％以上)が、英語母語話者らしい英語の発音と判定された。一方、英語訛のある日本語の判定では、ラ行子音に/r/の音を多用した発話(60％以上)が英語話者の話す日本語と判定された。/l/の割合が80％の日本語を英語話者の日本語と判定した被験者はいなかった。
文字表記の視覚効果と第二言語の音素認識の関係の検証と音声教育への応用

2015 ドゥテ・シルヴァン, ショート・グレゴリー

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 本研究は、日本語話者が苦手とする外国語音素の文字表記をかき分けることにより、それが第二言語の音素の認識に影響を与えるかどうかを、中学生を対象とし、調査した。英語の発音で日本語話者が最も苦手とする/l/と/r/、/b/と/v/の習得を、日本語の文字表記との関連から検証し、学習者に英語の発音を「バビブベボ」と「ヴァヴィヴヴェヴォ」またラ行は片仮名とアルファベットのLとRを組み合わせて書き分けさせることで、綴りの習得に差が出るか調査を行った。半年間という限られた期間の調査であったので、個人差も大きくはっきりと差が出たわけではないが、全体的な傾向として、書き分けをしたグループの学習者はコントロールグループと比較して、/l/-/r/、/b/-/v/とも、文字の認識に若干であるが有意な差が見られた。今後学校教育の限られた学習時間で、発音記号を十分教えられなくても、片仮名を用いて十分効果的な発音教育が行えるようになる可能性を示唆している。
英語における日本語アクセントの解析：音素の逸脱度と発話理解度の検証

2014

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　英語音声コーパスを用い、日本人英語話者94人分のデータをアメリカ標準英語話者の発話と比較した。日本語話者の英語の発話は、母音の問題のほうが、子音の問題よりも圧倒的に多く（4,478/6,620例）、全英語レベルにおいて、ストレスの有無による母音のF0と音圧の制御は見られたが、母音長の制御は上級レベル話者の発話にのみ見られた。子音に関しては、/l/-/r/, /b/-/v/, /s/-/θ/, /z/-/dz/等の間違いが数多く見られたが(2,142/6,620例)、音素の代用に明らかな方向性が見られた。例えば、日本語話者の英語の発話には、/l/の代わりに/r/の代用は多く起きるが、/r/の代わりに/l/を代用することは非常に少ない。これは、日本語話者が英語の/r/を新しい音として認識しているからだと思われる。
日本語のモーラとシラブルの音声発話と知覚における機能

2004

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　本研究は、発話リズムの基本単位が日本語と異なるフランス語を用いて、日本語話者のフランス語発話を分析することにより、日本語話者の発話リズムの基本単位の考察を行ったものである。フランス語はシラブルを基本とした発話リズムを持つ言語であるが、日本語話者のフランス語フレーズの時間制御を分析することで、日本語話者の発話リズムはモーラとシラブルのどちらを基本単位としているかを検証した。　本研究の実験では、日本語話者、フランス語話者、各５名ずつを被験者とし、シラブル数が同じであるが、理論上日本語話者が母音の長さが異なる（短母音＝1モーラ、長母音＝2モーラ）と捉える音韻環境にあるフランス語の数対のフレーズ（garcons　と　gares sont，l’otarie と　l’eau tarit，touret　と tour est等）を用い、日本語話者のフランス語発話に母音長の差が見られるかを測定し、フランス語話者の発話と比較した。　実験の結果、フランス語話者の発話では、シラブル数によるフレーズ長に有意な差がみられたが、モーラ数による影響は見られなかったばかりか、モーラ数が少ないフレーズのほうが長い対も少なくなかった。一方、日本語話者のフランス語発話には、シラブル数の影響は見られなかったが、モーラ数とフレーズ長の関係には有意な差が確認された。つまり、日本語の発話と同様、モーラ数に正比例して、フレーズ長が一定の割合で長くなった。　これらの結果から、(１)日本語話者は外国語（ここではフランス語）の音を聞いたとき、日本語のリズムの単位（モーラ）を用い、音の連鎖を分析する。(２)日本語話者は、音の認識の基本単位モーラを発話の基本単位とする。(３)日本語話者のフランス語の音声認識において、音韻理論上の分析法すべてが同様に用いられているわけではなく、音素配列に基づいた子音間への母音の挿入は、語末が閉音節など特定の音声環境によっては起こるとは限らない。従って、モーラ数の増加によるフレーズ長増加も起こらない。理由としては、インプットの段階で、モーラを単独で形成できない浮遊子音は、フレーズ長の制御に影響を与えないらしいということが考えられるということが分かった。
第二言語のアクセント習得における第一言語の干渉の音響音声学的研究

2002

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　本研究は第一言語が第二言語の韻律、特に発話リズムとアクセントの習得にどのような影響を与えるかを実験・調査研究したものである。2001年4月に研究計画書を作成した時点では、発話を中心に事象を検証していく予定であったが、その後発表された新しい文献の情報から、音声の知覚・認識の更なる検証が必要ということが判明したため、発話とあわせて、日本語話者の外国語音の連鎖の解読の仕組みも調査した。　まず、日本語話者の韻律に関しては、モーラを基準とする時間制御の要素が圧倒的に強く現れた。日本語話者の発話実験では、フレーズのシラブル数と使われている音が同じでありながら、日本語話者が分析した場合モーラ数が異なるフランス語のフレーズの総継続時間を計った結果、日本語話者の発話ではシラブル数に関係なくモーラ数が多いフレーズ長が明らかに長くなる傾向があった。つまり日本語話者は、外国語の音の連鎖をモーラを単位として解析し、モーラ数に準じて発話長も変化することがあらためて立証された。基本周波数や母音の強度等、その他の要素には有意な差が見られなかった。　また、英語話者のうち上級日本語発話においては、(1)モーラを単位とする時間制御ができていた話者と、(2)時間制御がうまくいっていない話者とに大別された。(1)の時間制御ができていた話者は(a) 発話のピッチレンジを英語を話しているときに比べて狭めることにより、時間制御を達成しようとしているといった傾向がみられた。(2)の時間制御がうまくできていない英語話者は(b)ピッチレンジが英語発話時と殆ど変わりがない人が多かった。つまり、英語話者にとってストレスの有無と母音長は密接な関係にあり、ピッチつまり基本周波数の変化が伴った場合、母音の継続時間を制御させるのが難しいため、発話のピッチレンジを押さえることにより、母音長への影響を極力押さえるというストラテジーを無意識に採用しているものと思われる。　残念であったのは、当初言語の初級者と上級者の発話を比較する予定であったが、初級者のデータは読み間違いが多すぎ、またフレーズ中にポーズが挿入されてしまっていたサンプルが多すぎて、データとしては使えないものが多かったため、比較はとりあえずしていない。テストフレーズが初級者には難しかったのかもしれない。今後の課題として検討したいと思う。
英語話者と日本語話者による語のアクセントの実現とストラテジーの音響的考察

2000

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　本研究では日本語を学習中の英語話者4名の日本語の発話を日本語話者5名の日本語と比較し、語アクセント具現化の方法と英語アクセント具現化の日本語への干渉を調査した。実験にはアクセント位置のことなる2モーラ語（籠―加護、型―肩、量―傘、等）を用い、語アクセントの有無による基本周波数の変化、母音の長さ、母音の強度を比較した。日本語話者の結果には有意な個人差は見られず、いずれの被験者も語アクセントは基本的には基本周波数の変化で表し、語アクセントの有無により、母音の長さや強度に有意な差が見られることはなかった。　一方、英語者においては、まず被験者のデータに個人差が大きく、どこまで英語話者の傾向として一般化が可能かがまず問題となろう。また、英語話者は第一モーラにアクセントを置くことは問題がなかったが、語アクセントの位置が実験用のテキストに明確に示されていたにもかかわらず、第二モーラにアクセントを置けないサンプルが少なからず生じた。また特に無アクセント語は、殆どのサンプルで第一モーラにアクセントが置かれていた。語アクセントが正しく置かれていたサンプルを取り出し、アクセントの有無により、同種母音の長さと強度を比較をした。母音の長さではアクセントが置かれた母音は置かれない母音と比べて、明かに継続時間が長くなっていた。その理由としては、英語においてはアクセント核のある母音の継続時間が長くなるため、その母語の干渉により母音が長くなったと考えられる。また英語では、アクセントの置かれない母音には弱化現象が起こり、調音の中舌化に加え継続時間も短縮されるため、日本語においても非アクセント母音の弱化現象という英語からの別種の干渉の両方が原因として考えられる。また、アクセントの置かれた母音の強度に関しても、継続時間と同様、英語話者の日本語ではアクセントの置かれた母音には顕著な強度の増加がみられ、アクセントの置かれていない同種の母音の強度とに有意な差が認められた。　この実験の結果から、英語話者は日本語のアクセントを表すために、日本語話者と同様、基本周波数を用いているが、同時に英語における語アクセント具現化の音響特徴（母音の継続時間と強度）も移行していることがわかった。また、個人差がかなりあるものの、継続時間の制御を比較的うまく行っている被験者には、ピッチ幅を押さえることにより継続時間の制御を行う傾向もみられた。この点に関しては今後の詳しい調査が必要と思われる。

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