Parental selection of vocal behavior : Crying, cooing, babbling, and the evolution of language
- PMID: 26181412
- DOI: 10.1007/s12110-006-1015-x
Parental selection of vocal behavior : Crying, cooing, babbling, and the evolution of language
Abstract
Although all natural languages are spoken, there is no accepted account of the evolution of a skill prerequisite to language-control of the movements of speech. If selection applied at sexual maturity, individuals achieving some command of articulate vocal behavior in previous stages would have enjoyed unusual advantages in adulthood. I offer a parental selection hypothesis, according to which hominin parents apportioned care, in part, on the basis of their infants' vocal behavior. Specifically, it is suggested that persistent or noxious crying reduced care to individuals who would have had difficulty learning complex behaviors, and that cooing and babbling increased social interaction and care as well as control over complex oralmotor activity of the sort required by spoken language. Several different tests of the hypothesis are suggested.
Keywords: Crying; Evolution of language; Infant speech.
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