EFFECT OF DELAY‐INTERVAL ILLUMINATION ON MATCHING BEHAVIOR IN THE CAPUCHIN MONKEY1

Michael R. D'Amato · Ward O’Neill

83 citations0/0 files storedJournal of the Experimental Analysis of Behavior

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Primate Behavior and Ecology Memory and Neural Mechanisms Memory Processes and Influences

Abstract

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.

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References

1965Behavior of Nonhuman Primates 1941Matching-from-sample by rhesus monkeys and by children.

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1986A comparison of visual and auditory short-term memory in monkeys (Cebus apella).1973Ambient light, white noise, and monkey vocalization as sources of interference in visual short-term memory of monkeys.

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