Abstract
Use of the selective adaptation procedure with speech stimuli has led to a number of theoretical positions with regard to the level or levels of processing affected by adaptation. Recent experiments (i.e., Sawusch & Jusczyk, 1981) have, however, yielded strong evidence that only auditory coding processes are affected by selective adaptation. In the present experiment, a test series that varied along the phonetic dimension of place of articulation for stops ([da]-[ga]) was used in conjunction with a [ska] syllable that shared the phonetic value of velar with the [ga] end of the test series but had a spectral structure that closely matched a stimulus from the [da] end of the series. As an adaptor, the [ska] and Ida] stimuli produced identical effects, whereas in a paired-comparison procedure, the [ska] produced effects consistent with its phonetic label. These results offer further support for the contention that selective adaptation affects only the auditory coding of speech, whereas the paired-comparison procedure affects only the phonetic coding of speech. On the basis of these results and previous place-adaptation results, a process model of speech perception is described.
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Kewley-Port, D.KLTEXC: Executive program to implement the KLA TT software synthesizer (Research on Speech Perception, Progress Report, Vol. 4, pp. 235–246.) Bloomington: Indiana University, 1978.
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This work was supported by NIMH Grant R01MH31468 to the State University of New York at Buffalo.
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Sawusch, J.R., Nusbaum, H.C. Auditory and phonetic processes in place perception for stops. Perception & Psychophysics 34, 560–568 (1983). https://doi.org/10.3758/BF03205911
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DOI: https://doi.org/10.3758/BF03205911