Individual differences in speech perception: sources, functions, and consequences of phoneme categorization gradiency
During spoken language comprehension, listeners transform continuous acoustic cues into categories (e.g. /b/ and /p/). While longstanding research suggests that phoneme categories are activated in a gradient way, there are also clear individual differences, with more gradient categorization being li...
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ndltd-uiowa.edu-oai-ir.uiowa.edu-etd-64572019-10-13T04:38:15Z Individual differences in speech perception: sources, functions, and consequences of phoneme categorization gradiency Kapnoula, Efthymia Evangelia During spoken language comprehension, listeners transform continuous acoustic cues into categories (e.g. /b/ and /p/). While longstanding research suggests that phoneme categories are activated in a gradient way, there are also clear individual differences, with more gradient categorization being linked to various communication impairment like dyslexia and specific language impairments (Joanisse, Manis, Keating, & Seidenberg, 2000; López-Zamora, Luque, Álvarez, & Cobos, 2012; Serniclaes, Van Heghe, Mousty, Carré, & Sprenger-Charolles, 2004; Werker & Tees, 1987). Crucially, most studies have used two-alternative forced choice (2AFC) tasks to measure the sharpness of between-category boundaries. Here we propose an alternative paradigm that allows us to measure categorization gradiency in a more direct way. We then use this measure in an individual differences paradigm to: (a) examine the nature of categorization gradiency, (b) explore its links to different aspects of speech perception and other cognitive processes, (c) test different hypotheses about its sources, (d) evaluate its (positive/negative) role in spoken language comprehension, and (e) assess whether it can be modified via training. Our results provide validation for this new method of assessing phoneme categorization gradiency and offer valuable insights into the mechanisms that underlie speech perception. 2016-05-01T07:00:00Z dissertation application/pdf https://ir.uiowa.edu/etd/3115 https://ir.uiowa.edu/cgi/viewcontent.cgi?article=6457&context=etd Copyright 2016 Efthymia Evangelia Kapnoula Theses and Dissertations eng University of IowaMcMurray, Bob publicabstract categorical perception cue encoding individual differences phoneme categorization speech perception visual analogue scaling Psychology |
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publicabstract categorical perception cue encoding individual differences phoneme categorization speech perception visual analogue scaling Psychology |
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publicabstract categorical perception cue encoding individual differences phoneme categorization speech perception visual analogue scaling Psychology Kapnoula, Efthymia Evangelia Individual differences in speech perception: sources, functions, and consequences of phoneme categorization gradiency |
description |
During spoken language comprehension, listeners transform continuous acoustic cues into categories (e.g. /b/ and /p/). While longstanding research suggests that phoneme categories are activated in a gradient way, there are also clear individual differences, with more gradient categorization being linked to various communication impairment like dyslexia and specific language impairments (Joanisse, Manis, Keating, & Seidenberg, 2000; López-Zamora, Luque, Álvarez, & Cobos, 2012; Serniclaes, Van Heghe, Mousty, Carré, & Sprenger-Charolles, 2004; Werker & Tees, 1987).
Crucially, most studies have used two-alternative forced choice (2AFC) tasks to measure the sharpness of between-category boundaries. Here we propose an alternative paradigm that allows us to measure categorization gradiency in a more direct way. We then use this measure in an individual differences paradigm to: (a) examine the nature of categorization gradiency, (b) explore its links to different aspects of speech perception and other cognitive processes, (c) test different hypotheses about its sources, (d) evaluate its (positive/negative) role in spoken language comprehension, and (e) assess whether it can be modified via training.
Our results provide validation for this new method of assessing phoneme categorization gradiency and offer valuable insights into the mechanisms that underlie speech perception. |
author2 |
McMurray, Bob |
author_facet |
McMurray, Bob Kapnoula, Efthymia Evangelia |
author |
Kapnoula, Efthymia Evangelia |
author_sort |
Kapnoula, Efthymia Evangelia |
title |
Individual differences in speech perception: sources, functions, and consequences of phoneme categorization gradiency |
title_short |
Individual differences in speech perception: sources, functions, and consequences of phoneme categorization gradiency |
title_full |
Individual differences in speech perception: sources, functions, and consequences of phoneme categorization gradiency |
title_fullStr |
Individual differences in speech perception: sources, functions, and consequences of phoneme categorization gradiency |
title_full_unstemmed |
Individual differences in speech perception: sources, functions, and consequences of phoneme categorization gradiency |
title_sort |
individual differences in speech perception: sources, functions, and consequences of phoneme categorization gradiency |
publisher |
University of Iowa |
publishDate |
2016 |
url |
https://ir.uiowa.edu/etd/3115 https://ir.uiowa.edu/cgi/viewcontent.cgi?article=6457&context=etd |
work_keys_str_mv |
AT kapnoulaefthymiaevangelia individualdifferencesinspeechperceptionsourcesfunctionsandconsequencesofphonemecategorizationgradiency |
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1719264612429332480 |