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Analysis of the overlearning-extinction effect in honeybees |
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| Authors: | Akira Shinoda M E Bitterman |
| Institution: | 1. Gakushuin University, Tokyo, Japan 2. University of Hawaii, Honolulu, Hawaii 3. Békésy Laboratory of Neurobiology, 1993 East-West Road, 96822, Honolulu, HI |
| Abstract: | In previous experiments with individual honeybees that visited the laboratory regularly to take sucrose solution from a target set on the shelf of an open window, the overlearning-extinction effect was found for high concentrations of sucrose but not for low. The purpose of the present experiment was to examine the possibility that declining resistance to extinction in the course of prolonged training with a high concentration of sucrose could be explained in terms of increasing nutritive level. Three groups of animals were extinguished on a distinctive target, one group after 6 visits to the target, a second after 18 visits to the target, and a third after 6 visits to the target that were interspersed among 12 visits to a different target. More rapid extinction in the second group than in the third, which had fewer training visits to the extinction target than the second but the same total number of training visits, rules out an explanation in terms of nutritive level and points instead to a frustration-like process evidenced also in earlier work on incentive contrast. |
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