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Science 15 May 1970:
Vol. 168. no. 3933, pp. 873 - 875
DOI: 10.1126/science.168.3933.873
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Articles

Fixation Produced by Conflict

Eileen B. Karsh 1

1 Department of Psychology, Temple University, Philadelphia, Pennsylvania 19122

All rats given a choice between a rewarded alternative and a conflict alternative (rewarded and punished) developed position fixations when the position of the alternatives was reversed. In contrast, all animals given one rewarded alternative and another nonrewarded (or punished and nonrewarded) alternative learned to choose the rewarded side during 25 successive reversals.

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Science. ISSN 0036-8075 (print), 1095-9203 (online)