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Osvath and Osvath (Anim Cogn 11: 661–674, 2008) report innovative studies with two chimpanzees and one orangutan that suggest some capacity to select and keep a tool for use about an hour later. This is a welcome contribution to a small, but rapidly growing, field. Here we point out some of the weaknesses in the current data and caution the interpretation the authors advance. It is not clear to what...
Suddendorf, Corballis and Collier-Baker (Anim Cogn 12: 751–754, 2009) comment on a study on great ape foresight (Osvath and Osvath, Anim Cogn 11: 661–674, 2008). That study consisted of four experiments investigating foresight in chimpanzees and orangutans, examining in particular whether the planning they exhibit is best explained by assuming an episodic cognitive system. This system has widely been...
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