Memory for pictures of upright and inverted primate faces in humans (Homo sapiens), squirrel monkeys (Saimiri sciureus), and pigeons (Columba livia).

Humans (Homo sapiens) and squirrel monkeys (Saimiri sciureus) were tested for memory of upright and inverted primate faces. Working memory was tested in Experiment 1 with a delayed matching-to-sample procedure, and reference memory was examined in Experiment 2 by requiring subjects to learn to discriminate between successive pairs of upright or inverted… (More)