Emotional Expression by Infants through Vocalization. Perceptual Evaluation.

概要

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The emotional aspects of infants' vocalizations recorded in mother/infant interactions were analyzed through perceptual experiments. Crying was not included. Results showed that most vocalizations recorded at 6 and 9 months of age were rated highly for terms expressing positive emotions such as "amaeru" and "pleasure." On the other hand, those recorded at 12 and 17 months were rated highly not only for positive emotions like "happy" and "pleasure, " but also for negative emotions such as "refusal" and "anger." These results indicate that infants' vocalizations at very early months of age contain a wide variety of acoustic characteristics which may convey various emotional expressions, but that the ability to express negative emotion without crying might still be developing at least during the first 6 and 9 months. Not all aspects of emotional expression through voice seemed to develop synchronously or simultaneously.
日本音声言語医学会の論文