Behavioral and Brain Sciences

Open Peer Commentary
Heyes, C. M.: Theory of mind in nonhuman primates

Theory of mind in nonhuman primates: A question of language?

Colin Gray a1 and Phil Russell a1
a1 Department of Psychology, University of Aberdeen, Aberdeen AB24 2UB, Scotland


Two substantive comments are made. The first is methodological, and concerns Heyes's proposals for a critical test for theory of mind. The second is theoretical, and concerns the appropriateness of asking questions about theory of mind in nonhuman primates. Although Heyes warns against the apparent simplicity of the theory of mind hypothesis, she underplays the linguistic implications.