Auditory Processing in Children's Speech Perception

Abstract

Five- to six-year-old children and adults participated in discrimination and selective adaptation speech perception tasks using a synthetic consonant-vowel continuum ranging from [ba] to [da]. In one condition of selective adaptation, attention was focused on the adapting stimulus, the continuum-endpoint [ba], with a whispering task. In another condition, attention was focused away from the continuum-endpoint [da] adaptor to contralaterally presented syllables "SHE" and "SEE." Results, compared with two more typical adaptation conditions, indicated that focused attention did not augment selective adaptation effects, particularly for children who showed smaller effects with focused attention on the adaptor. In contrast to adults, children did not significantly change labeling responses after exposure to endpoint-[ba] adaptors, results matching those of Sussman and Carney (1989). However, children did significantly change labeling following exposure to endpoint-[da] adaptors. Discrimination findings with five-formant consonant-vowel and single-formant stimuli supported the importance of acoustic processing for the selective adaptation tasks performed. Together, results support hypotheses of sensory processing differences in younger, normally developing children compared with adults and show that such abilities appear to be related to speech perception skills.

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