Journal
JOURNAL OF COMPARATIVE PSYCHOLOGY
Volume 119, Issue 2, Pages 210-219Publisher
AMER PSYCHOLOGICAL ASSOC
DOI: 10.1037/0735-7036.119.2.210
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Funding
- NICHD NIH HHS [HD06016] Funding Source: Medline
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Cotton-top tamarins (Saguinus oedipus) selected canes positioned so that a straight inward pull brought food within reach (M. D. Hauser, 1997). Tamarins failed to retrieve food with canes in other positions, and they did not reposition these canes. In this study, tufted capuchin monkeys (Cebus apella) preferred canes they could pull straight in when these were present, but they also repositioned canes in individually variable ways, and their success at obtaining food with repositioned canes improved with practice. In accord with predictions drawn from ecological psychology, capuchins discovered affordances of canes through exploratory actions with these objects, whereas tamarins did not. Ecological theory predicts these differences on the basis of species-typical manipulative activity, and it provides a useful approach for the study of species differences in tool-using behavior.
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