Reports

Intermodal Equivalence of Stimuli in Apes

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Science  10 Apr 1970:
Vol. 168, Issue 3928, pp. 279-280
DOI: 10.1126/science.168.3928.279

Abstract

Orang-utans and chimpanzees can discriminate between two objects on the basis of tactile cues and select the one that matches a visually presented sample.