Fixation produced by conflict.
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.
D000818:Animals; D003220:Conflict, Psychological; D004597:Electroshock; D005108:Extinction, Psychological; D011678:Punishment; D051381:Rats; D012193:Reversal Learning; D012201:Reward