NDLI: Wild chimpanzees (Pan troglodytes schweinfurthii) distinguish between different scream types: evidence from a playback study

Content Provider	Springer Nature Link
Author	Slocombe, Katie Elizabeth Townsend, Simon W. Zuberbühler, Klaus
Copyright Year	2008
Abstract	When experiencing aggression from group members, chimpanzees commonly produce screams. These agonistic screams are graded signals and vary acoustically as a function of the severity of aggression the caller is facing. We conducted a series of field playback experiments with a community of wild chimpanzees in the Budongo Forest, Uganda, to determine whether individuals could meaningfully distinguish between screams given in different agonistic contexts. We compared six subjects’ responses to screams given in response to severe and mild aggression. Subjects consistently discriminated between the two scream types. To address the possibility that the response differences were driven directly by the screams’ peripheral acoustic features, rather than any attached social meaning, we also tested the subjects’ responses to tantrum screams. These screams are given by individuals that experienced social frustration, but no physical threat, yet acoustically they are very similar to screams of victims of severe aggression. We found chimpanzees looked longer at severe victim screams than either mild victim screams or tantrum screams. Our results indicate that chimpanzees attend to the informational content of screams and are able to distinguish between different scream variants, which form part of a graded continuum.
Starting Page	441
Ending Page	449
Page Count	9
File Format	PDF
ISSN	14359448
Journal	Animal Cognition
Volume Number	12
Issue Number	3
e-ISSN	14359456
Language	English
Publisher	Springer-Verlag
Publisher Date	2008-12-28
Publisher Place	Berlin, Heidelberg
Access Restriction	Subscribed
Subject Keyword	Vocalisations Playback experiment Chimpanzees Screams Social cognition Zoology Behavioural Sciences Human Physiology Evolutionary Biology
Content Type	Text
Resource Type	Article
Subject	Experimental and Cognitive Psychology Ecology, Evolution, Behavior and Systematics

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