Individual Differences in Infant Development of Emotional Expression through Vocalization
نویسندگان
چکیده
Developmental aspects of emotional expression through vocalizations by infants were investigated using perceptual experiments by normal hearing adults. The voices used were 517 samples recorded from 6 infants at 6, 9,12 and 17 months of age, The results were as follows. 1) Two-way ANOVA with the factors of individuality and age showed significant effects of infant and infantage interaction on the emotional profile of vocalizations. But infants' age alone was not significant. 2) Factor analysis revealed three factors: plesure vs. displeasure, speech vs. laughter and intraverted vs. extraverted emotional expressions. Infants produced almost all aspects of emotion even at 6 months of age. These results suggest that infants even at 6 months of age have the ability to produce voices which may convey variety of emotion.
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