Speech-like sounds dominate the human infant landscape
D. Kimbrough Oller, Gordon Ramsay, Edina R. Bene, Helen L. Long, Ulrike Griebel
The paper quantifies the frequency of human infant laughter and protophones in natural environments, finding laughter occurs less frequently than cries and protophones dominate vocalizations.
Philosophical Transactions of the Royal Society B Biological Sciences · Sep 6, 2021Peer-reviewedDevelopmental Biology