Performance correlates of social behavior and organization: Social rank and complex problem solving in crab-eating macaques (M. fascicularis) |
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Authors: | Bradford N Bunnell Mary N Perkins |
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Institution: | (1) Department of Psychology, University of Georgia, 30602 Athens, Georgia, U.S.A. |
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Abstract: | Seventeen male crab-eating macaques, drawn from two captive troops, were tested on a series of complex problem solving tasks
in a Wisconsin General Test Apparatus (wgta). The animals were trained on a series of 6-trial object quality learning set problems followed by a series of 10-trial object
quality learning set problems. They were then given problems in which the correct stimulus object was reversed part way through
the problem. After the animals reached criterion on this task, the reversal learning set was then extinguished. High ranking
animals made more intraproblem errors than low ranking animals on the 6-trial problems, but there was no relationship between
social status and the rapidity with which the object quality learning set was established. Animals that received overtraining
on the 6-trial problems transferred their learning virtually intact to the 10-trial problems; however, high ranking animals
without overtraining made more errors than low ranking animals. On reversal learning and reversal extinction, high ranking
animals made more errors on critical trials, indicating that they formed and extinguished the reversal set more slowly than
low ranking animals. Object quality sets, as measured by trial-2 performance, were not affected by the reversal conditions.
Supported by USAMRDC Contract No. DADA 17-73-C-3007. |
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