Reports

Infants' discrimination of the duration of a rapid spectrum change in nonspeech signals

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Science  14 Oct 1983:
Vol. 222, Issue 4620, pp. 175-177
DOI: 10.1126/science.6623067

Abstract

Two-month-old infants discriminated complex sinusoidal patterns that varied in the duration of their initial frequency transitions. Discrimination of these nonspeech sinusoidal patterns was a function of both the duration of the transitions and the total duration of the stimulus pattern. This contextual effect was observed even though the information specifying stimulus duration occurred after the transitional information. These findings parallel those observed with infants for perception of synthetic speech stimuli. Specialized speech processing capacities are thus not required to account for infants' sensitivity to contextual effects in acoustic signals, whether speech or nonspeech.

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