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EFFECT OF DELAY‐INTERVAL ILLUMINATION ON MATCHING BEHAVIOR IN THE CAPUCHIN MONKEY 1
Author(s) -
D'Amato M. R.,
O'Neill Ward
Publication year - 1971
Publication title -
journal of the experimental analysis of behavior
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.75
H-Index - 61
eISSN - 1938-3711
pISSN - 0022-5002
DOI - 10.1901/jeab.1971.15-327
Subject(s) - matching (statistics) , darkness , interval (graph theory) , contrast (vision) , mathematics , artificial intelligence , computer vision , communication , pattern recognition (psychology) , computer science , psychology , optics , statistics , physics , combinatorics
Experiment 1 demonstrated that delayed matching‐to‐sample in the capuchin monkey was superior when the delay interval was spent in darkness rather than in moderate illumination. In contrast with previous studies in which the delayed‐matching ability of primates appeared limited to 60 sec or less, in the dark condition all subjects showed above‐chance matching at a 120‐sec delay interval. Experiment 2 verified that darkness during the delay interval can facilitate delayed matching and provided evidence that the effective variable was the illumination level of the delay interval rather than change in illumination, which in Exp. 1 was confounded with illumination level.