Five primate species follow the visual gaze of conspecifics. Chimpanzee gaze following in an object choice task. Chimpanzee and human culture. Primates causal understanding in the physical and psychological domains. Uniquely primate, uniquely human.
Chimpanzees follow gaze direction geometrically.
Emulation learning and cultural learning. Chimpanzees know what conspecifics do and do not see. Social cues that chimpanzees do and do not use to locate hidden objects. Two hypotheses about primate cognition. Evolution of human cognition.