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MARTIN Andrew Thomas

Position

Professor

Degree

Doctor of Philosophy(University of California, Los Angeles), Master of Arts(University of California, Los Angeles), Bachelor of Arts(Reed College)

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Graduating School 【 display / non-display

  • Reed College   Faculty of Literature   Graduated

    - 1991.7

Graduate School 【 display / non-display

  • University of California, Los Angeles   Linguistics Department   Doctor's Course   Completed

    - 2007.12

Campus Career 【 display / non-display

  • KONAN UNIVERSITY   Faculty of Letters   Faculty of Letters Department of English Literature and Language   Professor

    2022.4

  • KONAN UNIVERSITY   Faculty of Letters   Faculty of Letters Department of English Literature and Language   Associate Professor

    2015.4 - 2022.3

 

Papers 【 display / non-display

  • The sound symbolism of size and speed in Japanese vehicle and Pokemon character names

    Andrew Martin

    甲南大学紀要・文学編   171   53 - 58   2021.3

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    Single Work

    DOI: 10.14990/00003759

  • Are Words Easier to Learn From Infant‐Than Adult‐Directed Speech? A Quantitative Corpus‐Based Investigation Reviewed

    Adriana Guevara‐Rukoz, Alejandrina Cristia, Bogdan Ludusan, Roland Thiollière, Andrew Martin, Reiko Mazuka, Emmanuel Dupoux

    Cognitive Science   42 ( 5 )   1586 - 1617   2018.7

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    Joint Work

  • Vowels in infant-directed speech: More breathy and more variable, but not clearer Reviewed

    Kouki Miyazawa, Takahito Shinya, Andrew Martin, Hideaki Kikuchi, Reiko Mazuka

    Cognition   2017.9

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    Joint Work

  • Utterances in infant-directed speech are shorter, not slower

    Andrew Martin, Yosuke Igarashi, Nobuyuki Jincho, Reiko Mazuka

    COGNITION   156   52 - 59   2016.11

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    Joint Work

    Publisher:ELSEVIER  

    It has become a truism in the literature on infant-directed speech (IDS) that IDS is pronounced more slowly than adult-directed speech (ADS). Using recordings of 22 Japanese mothers speaking to their infant and to an adult, we show that although IDS has an overall lower mean speech rate than ADS, this is not the result of an across-the-board slowing in which every vowel is expanded equally. Instead, the speech rate difference is entirely due to the effects of phrase-final lengthening, which disproportionally affects IDS because of its shorter utterances. These results demonstrate that taking utterance-internal prosodic characteristics into account is crucial to studies of speech rate. (C) 2016 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.cognition.2016.07.015

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  • Learnability of prosodic boundaries: Is infant-directed speech easier?

    Bogdan Ludusan, Alejandrina Cristia, Andrew Martin, Reiko Mazuka, Emmanuel Dupoux

    JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA   140 ( 2 )   1239 - 1250   2016.8

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    Joint Work

    Publisher:ACOUSTICAL SOC AMER AMER INST PHYSICS  

    This study explores the long-standing hypothesis that the acoustic cues to prosodic boundaries in infant-directed speech (IDS) make those boundaries easier to learn than those in adult-directed speech (ADS). Three cues (pause duration, nucleus duration, and pitch change) were investigated, by means of a systematic review of the literature, statistical analyses of a corpus of Japanese, and machine learning experiments. The review of previous work revealed that the effect of register on boundary cues is less well established than previously thought, and that results often vary across studies for certain cues. Statistical analyses run on a large database of mother-child and mother-interviewer interactions showed that the duration of a pause and the duration of the syllable nucleus preceding the boundary are two cues which are enhanced in IDS, while f0 change is actually degraded in IDS. Supervised and unsupervised machine learning techniques applied to these acoustic cues revealed that IDS boundaries were consistently better classified than ADS ones, regardless of the learning method used. The role of the cues examined in this study and the importance of these findings in the more general context of early linguistic structure acquisition is discussed. (C) 2016 Acoustical Society of America.

    DOI: 10.1121/1.4960576

    PubMed

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Presentations 【 display / non-display

  • Mothers speak less clearly to infants than to adults: A comprehensive test of the hyperarticulation hypothesis

    Andrew Martin, Thomas Schatz, Maarten Versteegh, Kouki Miyazawa, Reiko Mazuka, Emmanuel Dupoux, Alejandrina Cristia

    Linguistic Society of America Annual Meeting 

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    Event date: 2015.1

  • Japanese mothers undo function word reduction when talking to infants

    Andrew Martin, Keiichi Tajima, Reiko Mazuka

    Boston University Conference on Language Development 

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    Event date: 2014.11

  • Speech rate and final lengthening in Japanese infant-directed speech

    Andrew Martin, Yosuke Igarashi, Nobuyuki Jincho, Reiko Mazuka

    Linguistic Society of America Annual Meeting 

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    Event date: 2014.1

  • 対乳児発話の母音無声化

    Andrew Martin, Akira Utsugi, Reiko Mazuka

    日本発達心理学会 

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    Event date: 2013.3

  • Vowel devoicing in infant-directed Japanese: optimized for learning or understanding?

    Andrew Martin, Akira Utsugi, Reiko Mazuka

    Linguistic Society of America Annual Meeting 

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    Event date: 2012.1

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Grant-in-Aid for Scientific Research 【 display / non-display

  • プロトレキシコンと日本語の獲得

    2012.4 - 2015.3

    JSPS Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research(C)

    MARTIN Andrew

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    乳児においては、生後一年の間に自分の言語の音素システムの獲得がかなり進んでいるが、どのように獲得する
    かは未だ明らかになっていない。
    現在までに、乳児の音素獲得について二つの仮説が提案されている。まず第一の仮説はトップダウンと呼ばれる
    方法である。トップダウンの学習法では、最初に語彙を学習し、そしてその語彙の知識を使用し音素を学習する
    。第二の仮説はボトムアップと呼ばれる学習法である。ボトムアップの学習法では語彙を意識せずに一つ一つの
    音素の統計的分布をもとにその言語の音素を学習する。
    本研究では、日本語を学ぶ乳児がどういった情報を使用し、そしてその情報をどのように処理して、語彙と音素
    を学習するかという疑問を大規模な日本語母子会話コーパスと乳児を対象とする実験により研究を進める。