Primates Pass Dynamically Social Anticipatory-Looking False-Belief Tests

Published on August 26, 2020

Three recent studies [1–3], inspired by seminal work with human infants (e.g., [4]), have shown that non-human apes and macaques pass anticipatory-looking (AL) false-belief (FB) tests. These results raise the possibility that both apes and monkeys understand that others’ actions are driven not by reality but by beliefs about reality, even when those beliefs are false. In response, Horschler et al. [5] argued that these findings ‘should be interpreted cautiously due to methodological and theoretical challenges paralleling trends in the human literature.’ We agree that continued work is necessary to identify factors that influence reproducibility of AL paradigms and also to specify the mechanisms and functions of the observed behaviors in primates.

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