Chimpanzees, our closest relatives, have been shown to follow a human’s
gaze, but they do very poorly in a classic experiment that requires them to
extract clues by watching a person. In that test, a researcher hides food in
one of several containers out of sight of the animal. Then the chimp is allowed
to choose one container after the experimenter indicates the correct
choice by various methods, such as staring, nodding, pointing, tapping, or
placing a marker. Only with considerable training do chimps and other
primates manage to score above chance.5
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