Contingent feature analysis in speech perception |
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Authors: | William E. Cooper |
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Affiliation: | 1. Massachusetts Institute of Technology, E10-044, 02139, Cambridge, Massachusetts
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Abstract: | A contingent adaptation effect is reported for speech perception. Experiments were conducted to test the effects of an alternating sequence of two adapting syllables, [da] and [thi], on the perception of two series of synthetic speech syllables, [ba]-[pha] and [bi]-[phi]. Each of the test series consisted of 11 stimuli varying in voice onset time, a cue which distinguishes voiced from voiceless stop consonants in word-initial position. The [da]-[thi] adapting sequence produced opposite shifts in the loci of the phonetic boundaries for the two test series. For the [ba]-[pha] series, listeners made fewer identification responses to the [b] category after adaptation, while for the [bi]-[phi] series, listeners made more responses to the [b] category. The opposing shifts indicate that the perceptual analysis of voicing in stop consonants is carried out with respect to vowel environment. |
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