caa a22 4500 605542694 CHVBK 20210128100923.0 cr unu---uuuuu 210128e20150301xx s 000 0 eng 10.1007/s10071-014-0813-5 doi (NATIONALLICENCE)springer-10.1007/s10071-014-0813-5 From colour photographs to black-and-white line drawings: an assessment of chimpanzees' ( Pan troglodytes ') transfer behaviour [Elektronische Daten] [James Close, Josep Call] Over two experiments, we investigated the ability of two adolescent and two adult chimpanzees to generalise a learnt, pictorial categorisation to increasingly degraded and abstract stimuli. In Experiment 2, we further assessed the ability of the adolescent chimpanzees to engage in open-ended categorisation of black-and-white line drawings. The current results confirmed and extended previous findings, showing that sub-adult chimpanzees outperform adult chimpanzees in the categorisation of pictorial stimuli, particularly when the stimuli are more degraded and abstract in nature. However, none of the four chimpanzees showed positive transfer of their category learning to a set of black-and-white line drawings, and neither of the adolescent chimpanzees evidenced reliable open-ended categorisation of the black-and-white line drawings. The latter findings suggest that both sub-adult and adult chimpanzees find it difficult to recognise black-and-white line drawings, and that open-ended categorisation of black-and-white line drawings is challenging for chimpanzees. Springer-Verlag Berlin Heidelberg, 2014 Categorisation nationallicence Chimpanzees ( Pan troglodytes ) nationallicence Generalisation nationallicence Line drawings nationallicence Picture recognition nationallicence Close James Department of Developmental and Comparative Psychology, Max Planck Institute for Evolutionary Anthropology, Deutscher Platz 6, 04103, Leipzig, Germany aut Call Josep Department of Developmental and Comparative Psychology, Max Planck Institute for Evolutionary Anthropology, Deutscher Platz 6, 04103, Leipzig, Germany aut Animal Cognition Springer Berlin Heidelberg 18/2(2015-03-01), 437-449 1435-9448 18:2<437 2015 18 10071 https://doi.org/10.1007/s10071-014-0813-5 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s10071-014-0813-5 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Close James Department of Developmental and Comparative Psychology, Max Planck Institute for Evolutionary Anthropology, Deutscher Platz 6, 04103, Leipzig, Germany aut NATIONALLICENCE 700 1- Call Josep Department of Developmental and Comparative Psychology, Max Planck Institute for Evolutionary Anthropology, Deutscher Platz 6, 04103, Leipzig, Germany aut NATIONALLICENCE 773 0- Animal Cognition Springer Berlin Heidelberg 18/2(2015-03-01), 437-449 1435-9448 18:2<437 2015 18 10071