title: Identification of vocalizers by pant hoots, pant grunts and screams in a chimpanzee.
abstract: Identification of vocalizers was examined using an auditory-visual matching-to-sample task with a female chimpanzee. She succeeded in selecting the picture of the vocalizer in response to various types of vocalizations: pant hoots, pant grunts, and screams. When pant hoots by two chimpanzees were presented as a "duet", she could identify both of the vocalizers. These results suggest that researchers have underestimated the capability of vocalizer identification in chimpanzees. The chimpanzee correctly chose her own pictures in response to her vocalizations only by exclusion, and she did not show vocal self-recognition. The effect of acoustical modification (pitch shift and filtration) on the performance suggested that pitch is an important cue for the vocalizer identification.
authors.affiliation: Department of Behavioral and Brain Sciences, Primate Research Institute, Kyoto University, Kanrin, Inuyama, Aichi 484-8506, Japan. kojima@pri.kyoto-u.ac.jp
authors.forename: Shozo
authors.initials: S
authors.lastname: Kojima
authors.forename: Akihiro
authors.initials: A
authors.lastname: Izumi
authors.forename: Miyuki
authors.initials: M
authors.lastname: Ceugniet
mesh_terms: D000162:Acoustics; D000818:Animals; D001307:Auditory Perception; D005260:Female; D002679:Pan troglodytes / Q000523:psychology*; D014828:Vocalization, Animal