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date: 18 October 2019

Abstract and Keywords

Primates have unusually large brains for body size compared to all other vertebrates. Given the extraordinary cost of neural material, this raised a pressing question about why primates (in particular) should be willing to incur such high costs. This chapter begins by considering the various hypotheses aimed at addressing this question. It then discusses what social behavior can tell us about cognition and how cognition interfaces between brain and behavior.

Keywords: primates, brain size, social brain hypothesis, cognition, social behavior

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