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Learned vocal and breathing behavior in an enculturated gorilla

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Citation

Perlman, M., & Clark, N. (2015). Learned vocal and breathing behavior in an enculturated gorilla. Animal Cognition, 18(5), 1165-1179. doi:10.1007/s10071-015-0889-6.


Cite as: https://hdl.handle.net/11858/00-001M-0000-002B-870F-C
Abstract
We describe the repertoire of learned vocal and breathing-related behaviors (VBBs) performed by the enculturated gorilla Koko. We examined a large video corpus of Koko and observed 439 VBBs spread across 161 bouts. Our analysis shows that Koko exercises voluntary control over the performance of nine distinctive VBBs, which involve variable coordination of her breathing, larynx, and supralaryngeal articulators like the tongue and lips. Each of these behaviors is performed in the context of particular manual action routines and gestures. Based on these and other findings, we suggest that vocal learning and the ability to exercise volitional control over vocalization, particularly in a multimodal context, might have figured relatively early into the evolution of language, with some rudimentary capacity in place at the time of our last common ancestor with great apes.