Does perceptual learning in speech reflect changes in phonetic category representation or decision bias?
| Autor: | Constance M. Clarke-Davidson, James R. Sawusch, Paul A. Luce |
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| Rok vydání: | 2008 |
| Předmět: |
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media_common.quotation_subject Decision Making Experimental and Cognitive Psychology Phonetics Verbal Learning Verbal learning Sensory Systems Phonetic representation Task (computing) Categorization Perceptual learning Child Preschool Perception Lexical decision task Humans Speech Female Psychology General Psychology media_common Cognitive psychology |
| Zdroj: | Perception & Psychophysics. 70:604-618 |
| ISSN: | 1532-5962 0031-5117 |
| DOI: | 10.3758/pp.70.4.604 |
| Popis: | Recent studies show that perceptual boundaries between phonetic categories are changeable with training (Norris, McQueen,Cutler, 2003). For example, Kraljic and Samuel (2005) exposed listeners in a lexical decision task to ambiguous /s-integral/ sounds in either s-word contexts (e.g., legacy) or integral-word contexts (e.g., parachute). In a subsequent /s/-/integral/ categorization test, listeners in the /s/ condition categorized more tokens as /s/ than did those in the /integral/ condition. The effect--termed perceptual learning in speech--is assumed to reflect a change in phonetic category representation. However, the result could be due to a decision bias resulting from the training task. In Experiment 1, we replicated the basic Kraljic and Samuel (2005) experiment and added an AXB discrimination test. In Experiment 2, we used a task that is less likely to induce a decision bias. Results of both experiments and signal detection analyses point to a true change in phonetic representation. |
| Databáze: | OpenAIRE |
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