419 pages, 29 b/w illus, 30 figs, 49 tabs
Explores the mental differences between gorillas and orangutans, and compares them directly with human children to explore how human intelligence might have evolved. Introductory chapters set the evolutionary context for comparing cognition in gorillas and orangutans to that of chimpanzees, bonobos and humans. The remaining chapters focus primarily on the kinds and levels of intelligence displayed by orangutans and gorillas compared to other great apes, including performances in the classic domains of tool use and tool making, imitation, self-awareness, social communication and symbol use.
'! this book contains much valuable information on gorillas' and orang-utans' mental life.' Animal Behaviour '! and the present volume will go a long way towards bringing gorillas and orangutans back into the limelight of modern comparative cognition. For that the editors and contributors should be commended.' James R. Anderson, The Quarterly Journal of Experimental Psychology
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