The effects of lesions in amygdala or dorsomedial frontal cortex on reinforcement omission and noncontingent reinforcement in rats
Physiological Psychology - 2013
Tóm tắt
Two groups of six rats with lesions of the amygdala or dorsomedial frontal cortex were compared to normal controls in their response to occasional omission of food reward following training on an FI 60-sec schedule (Experiment 1). Both brain-damaged groups showed reliably greater increases in their responding in intervals following reward omission compared to their responding in intervals following reward delivery than did controls. In a second experiment, there was no difference between these groups in their response to complete elimination of reward (extinction). However, both groups with lesions reliably reduced responding to a greater extent than did controls when rewards were delivered noncontingently (free) on an FI 60-sec schedule. The results of both experiments were interpreted as demonstrating a reduced efficacy of secondary reinforcers to control the behavior of subjects with these limbic lesions.
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Tài liệu tham khảo
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