Elsevier

Brain and Language

Volume 5, Issue 1, January 1978, Pages 25-35
Brain and Language

Neuroelectrical correlates of categorical speech perception in adults

https://doi.org/10.1016/0093-934X(78)90004-4Get rights and content

Abstract

Auditory evoked potentials were recorded from the left and right hemispheres of 16 adults during a phoneme identification task. The use of multivariate statistics enabled researchers to identify a number of cortical processes related to categorical speech perception which were common to both hemispheres, as well as several which disinguished between the two hemispheres.

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    Additionally, event-related potentials (ERPs) have been recorded in healthy subjects who listened to a series of stop consonants with varying voice onset times (VOTs). ERPs from the LH varied linearly (low-level processing) with the VOT, whereas ERPs from the RH varied categorically [71,72], which suggests the role of RH areas in the categorical processing of voicing cues. The involvement of the RH in voicing processing is not in line with the strong version of the linguistic hypothesis, whereby speech, whatever its acoustic content, triggers a specific processing mode most favorably associated with the LH.

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This research was supported in part by Grant No. 2-15-87 from the Office of Research and Projects, Southern Illinois University at Carbondale.

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