Discrimination in speech and nonspeech modes.
| Number | 105 |
|---|---|
| Year | 1971 |
| Drawer | 2 |
| Entry Date | 05/19/1998 |
| Authors | Mattingly, I. G., Liberman, A. M., Syrdal, A. M., & Halwes, T. |
| Contact | |
| Publication | Cognitive Psychology, 2, 131-157 |
| url | http://www.haskins.yale.edu/Reprints/HL0105.pdf |
| Abstract | Discrimination of 2nd-formant transitions was measured under 2 conditions: when, as the only variation in 2-formant patterns, these transitions were responsible for the perceived distinctions among the stop-vowel syllables, and when, in isolation, they were heard, not as speech, but as bird-like chirps. The discrimination functions obtained with the synthetic syllables showed high peaks at phonetic boundaries and deep troughs within phonetic classes; those of the nonspeech chirps did not. Reversal of the stimulus patterns, producing vowel-stop syllables in the speech context and mirror-image chirps in isolation, affected the speech and nonspeech functions differently. An additional nonspeech condition, presentation of the transitions plus the 2nd-formant steady state, yielded data similar to those obtained with the transitions in isolation. These results support the conclusion that there is a speech processor different from that for other sounds. |
| Notes |
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