Affiliation: | 1.Centre for Social Learning and Cognitive Evolution, School of Psychology and Neuroscience, University of St Andrews, St Andrews, Fife, KY16 9JP, UK ;2.Department of Anthropology, University of California, Los Angeles, 375 Portola Plaza, 341 Haines Hall, Box 951553, Los Angeles, CA, 90095, USA ;3.Laboratoire de cognition comparée, Institut de Biologie, Université de Neuchâtel, Rue Emile-Argand 11, 2000, Neuchâtel, Switzerland ; |