Speech perception abilities vary substantially across listeners, particularly in adverse conditions including those stemming from environmental degradation (e.g., noise) or from talker-related challenges (e.g., nonnative or disordered speech). This study examined adult listeners' recognition of words in phrases produced by six talkers representing three speech varieties: a nonnative accent (Spanish-accented English), a regional dialect (Irish English), and a disordered variety (ataxic dysarthria). Semantically anomalous phrases from these talkers were presented in a transcription task and intelligibility scores, percent words correct, were compared across the three speech varieties. Three cognitive-linguistic areas—receptive vocabulary, cognitive flexibility, and inhibitory control of attention—were assessed as possible predictors of individual word recognition performance. Intelligibility scores for the Spanish accent were significantly correlated with scores for the Irish English and ataxic dysarthria. Scores for the Irish English and dysarthric speech, in contrast, were not correlated. Furthermore, receptive vocabulary was the only cognitive-linguistic assessment that significantly predicted intelligibility scores. These results suggest that, rather than a global skill of perceiving speech that deviates from native dialect norms, listeners may possess specific abilities to overcome particular types of acoustic-phonetic deviation. Furthermore, vocabulary size offers performance benefits for intelligibility of speech that deviates from one's typical dialect norms.
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November 2016
November 17 2016
Individual differences in the perception of regional, nonnative, and disordered speech varietiesa)
Tessa Bent;
Tessa Bent
b)
Department of Speech and Hearing Sciences,
Indiana University
, Bloomington, Indiana 47405, USA
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Melissa Baese-Berk;
Melissa Baese-Berk
Department of Linguistics,
University of Oregon
, Eugene, Oregon 97403, USA
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Stephanie A. Borrie;
Stephanie A. Borrie
Department of Communicative Disorders and Deaf Education,
Utah State University
, Logan, Utah 84332, USA
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Megan McKee
Megan McKee
Department of Speech and Hearing Sciences,
Indiana University
, Bloomington, Indiana 47405, USA
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b)
Electronic mail: [email protected]
a)
Portions of this work were previously presented in Baese-Berk et al. (2015) “Individual differences in perception of unfamiliar speech,” in The Scottish Consortium for ICPhS 2015 (Ed.), Proceedings of the 18th International Congress of Phonetic Sciences, The University of Glasgow, Glasgow, United Kingdom, paper number 0460, pp. 1–5.
J. Acoust. Soc. Am. 140, 3775–3786 (2016)
Article history
Received:
January 26 2016
Accepted:
October 19 2016
Citation
Tessa Bent, Melissa Baese-Berk, Stephanie A. Borrie, Megan McKee; Individual differences in the perception of regional, nonnative, and disordered speech varieties. J. Acoust. Soc. Am. 1 November 2016; 140 (5): 3775–3786. https://doi.org/10.1121/1.4966677
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