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Lexical correlates of comprehensibility versus accentedness in second language speech*

  • KAZUYA SAITO (a1), STUART WEBB (a2), PAVEL TROFIMOVICH (a3) and TALIA ISAACS (a4)
Abstract

The current project investigated the extent to which several lexical aspects of second language (L2) speech – appropriateness, fluency, variation, sophistication, abstractness, sense relations – interact to influence native speakers’ judgements of comprehensibility (ease of understanding) and accentedness (linguistic nativelikeness). Extemporaneous speech elicited from 40 French speakers of English with varied L2 proficiency levels was first evaluated by 10 native-speaking raters for comprehensibility and accentedness. Subsequently, the dataset was transcribed and analyzed for 12 lexical factors. Various lexical properties of L2 speech were found to be associated with L2 comprehensibility, and especially lexical accuracy (lemma appropriateness) and complexity (polysemy), indicating that these lexical variables are associated with successful L2 communication. In contrast, native speakers’ accent judgements seemed to be linked to surface-level details of lexical content (abstractness) and form (variation, morphological accuracy) rather than to its conceptual and contextual details (e.g., lemma appropriateness, polysemy).

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Corresponding author
Address for correspondence: Kazuya Saito, Birkbeck, University of London, The Department of Applied Linguistics and Communication, 30 Russell Square, London, WC1B 5DT, UK k.saito@bbk.ac.uk
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*

We are grateful to BLC reviewers for their constructive feedback on an earlier version of the manuscript, and to George Smith and Ze Shen Yao for their help for data collection and analyses. The project was funded by the Grant-in-Aid for Scientific Research in Japan (No. 26770202).

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Bilingualism: Language and Cognition
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