修士（文学） 神戸市外国語大学 1998/03
修士（学術） 名古屋大学 2001/03
博士 米国ハワイ大学 2008/12/20
A CHILDES Analysis of Mental State Verbs in Japanese and English IEICE Technical Report 学術雑誌 共著 116/ 159, 53-58 2016/07 Jun Nomura & Takaaki Suzuki This study compares Japanese-speaking mother-child dyads to English-speaking ones in terms of their use of mental state verbs. An analysis of spontaneous speech samples in the CHILDES archives revealed that finite clauses embedded under mental state verbs were used less frequently in Japanese than in English, both in terms of input frequency to children and children’s spontaneous production. We argue that this could be a contributing factor underlying the developmental delay of Theory of Mind in Japanese-speaking children.
Effects of first language processes and representations on second language perception: The case of vowel epenthesis by Japanese speakers International Journal of Bilingualism 学術雑誌 共著 2016/06 Jun Nomura & Keiichi Ishikawa
Aims and objectives/purpose/research questions: Japanese speakers are known to perceive “illusory vowels” within consonant clusters illicit in their language. The present study examines how this perceptual vowel epenthesis is affected by first language (L1) processes (restoration of vowels devoiced through Japanese high vowel devoicing), L1 representations (loanword representations in Japanese speakers’ lexicons), and proficiency in English. Design/methodology/approach: The participants judged the presence or absence of a mora (e.g., ム /mu/) in an auditorily presented English word (e.g., homesick). The 40 test items contained a heterosyllabic consonant cluster with four different voicing patterns to examine whether the vowel restoration process is related to vowel epenthesis. Twenty of the test items are frequently used as loanwords in Japanese, meaning that they are stored in the L1 lexicon with a vowel inserted inside the consonant cluster (e.g., /hoomusikku/). The other 20 are low-frequency items that are virtually nonwords for the non-native participants. Data and analysis: The vowel epenthesis rates and reaction times (RTs) were obtained from 14 introductory learners, 15 intermediate learners, and 19 native speakers. Findings/conclusions: The results show the main effects of Voice, Loanword Representation, and Proficiency, as well as the interaction among the three factors. Negative correlations between vowel epenthesis rates and RTs were also observed for the learners. The results indicate differential effects of vowel restoration and loanwords on perceptual epenthesis by learners of different proficiency levels. Originality: The present study was one of the first attempts to test the relation between proficiency and perceptual vowel epenthesis using real English words. Significance/implications: The findings demonstrate the robustness of L1 processes and representations in second language perception while substantiating the existing argument for early vowel epenthesis. They also raise questions regarding the effects of training and the role of native speaker input.
The roles of voice and familiarity in perceptual vowel insertion by Japanese learners of English Proceedings of the Acoustical Society of Japan 2012 Spring Meeting (March 2012, Kanagawa University, Japan) その他 共著 617–620 2012/03 with Glen Norris and Keiichi Ishikawa The likelihood of Japanese speakers' perceptual vowel insertion regarding English consonant clusters (e.g., magUnetto for 'magnet') was examined in a “mora detection task,” focusing on the effects of their familiarity with words and the voicing patterns for clusters. Both factors had significant main effects. We argue that perceptual vowel insertion is of two kinds: pre-lexical (phonology-based) and post-lexical (lexicon-based).
The effect of children’s conservativeness on the assessment of early discourse-pragmatic competence Handbook of the Japanese Society for Language Sciences 12th Annual International Conference その他 単著 69–72 2010/06 By analyzing spontaneous non-verb-final utterances produced by two Japanese-speaking children and their parents, the present study aims to provide evidence regarding why naturalistic studies tend to support early discourse-pragmatic sensitivity while experimental studies do not. Assuming that non-verb-final utterances with an adjectival or nominal predicate exhibit more transparent syntax-discourse mapping than those with a transitive or intransitive verb, the results show that transparent patterns are used appropriately and frequently in early speech. This in turn indicates that if they are encouraged to produce other patterns in experimental settings, they may well produce discourse-pragmatically infelicitous utterances. It is argued that this conservative use of "easy" patterns is one factor leading to the discrepancy between naturalistic and experimental studies regarding early discourse-pragmatic competence.
Japanese non-verb-final constituent order as a way to ensure referent activation Journal of the Japan Society for Speech Sciences 学術雑誌 単著 9, 49-63 2008/06 Although Japanese is known to be verb-final, NPs, PPs, etc. sometimes occur in the post-verbal position in casual speech (postposing). The first goal of the present study is to propose a classification of Japanese postposing based on the existing literature, focusing on the postposing of NPs (plus a case/topic marker or a postposition). Since previous studies have not yet reached agreement regarding the motivations for postposing, this study proposes a non-function-based classification of postposed elements (Tails): [−Pause], [+Pause], and Repeated. The second goal is to examine, through a corpus analysis, whether these types of postposing actually lead to statistical differences that are suggestive of different associated functions. The results show that [−Pause] Tails predominantly carry Given information, while [+Pause] and Repeated Tails carry New information. This indicates that [−Pause] Tails are primarily used for defocusing a Given element, [+Pause] Tails for repair, and Repeated Tails for introducing New elements. It is argued that the primary purpose of intentional postposing is to ensure the activation of a referent in the listener’s mind.
学会発表 The roles of voice and familiarity in perceptual vowel insertion by Japanese learners of English Acoustical Society of Japan 2012 Spring Meeting 2012/03
学会発表 The effect of children’s conservativeness on the assessment of early discourse-pragmatic competence Japanese Society for Language Sciences 12th Annual International Conference 2010/06
学会発表 The role of discourse-pragmatic stability in the acquisition of information structure 第1回ことばの科学会年次大会 2009/11
学会発表 Early sensitivity to information structure in Japanese 32nd Boston University Conference on Language Development (BUCLD 32) 2007/11
学会発表 Grammaticalization of information structure: The case of child Japanese postposing Mental Architecture for Processing and Learning of Language 2007 2007/07
日本第二言語習得学会 2012-現在 国内
日本音響学会 2011-現在 国内
言語科学会 2010-現在 国内
ことばの科学会（2008年11月まで「ことばの科学研究会」） 1995-現在 国内