Studies of chimpanzee vision by Ladygin-Kohts

• Published in: Journal of Comparative Psychology Vol. 5; no. 1; pp. 99 - 108
• Main Authors: Yerkes, R. M, Petrunkevitch, A
• Format: Journal Article
• Language: English
• Published: Williams & Wilkins Company 01-02-1925; American Psychological Association
• Subjects: Achromatic Color; Animal; Chimpanzees; Vision
• ISSN: 0093-4127; 0735-7036; 1939-2087
• DOI: 10.1037/h0073600

Using the method of choice from samples, Kohts has demonstrated that the chimpanzee can pick out colors to match samples but is not so clever in matching achromatic stimuli. The animal can also match plane and stereometric figures. But it lacks what might be called internally aroused incentive to these discriminations and has to be motivated by freedom for play and by example. Its memory was found to last no longer than fifteen seconds, and it was not given to abstraction, since it reacted to insignificant features and not to the significant features of a situation. Excellent still and motion pictures of the chimpanzee while undergoing emotion were obtained.