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. 1964 Oct 23;146(3643):549-51.
doi: 10.1126/science.146.3643.549.

COMPLEX VISUAL CONCEPT IN THE PIGEON

R J HERRNSTEIN, D H LOVELAND

COMPLEX VISUAL CONCEPT IN THE PIGEON

R J HERRNSTEIN et al. Science. .

Abstract

Pigeons were trained to respond to the presence or absence of human beings in photographs. The precision of their performances and the ease with which the training was accomplished suggest greater powers of conceptualization than are ordinarily attributed to animals.

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