Abstract
Amphetamine, 2 mg/kg administered on four trials one week apart, produced significantly higher freezing scores in an intermittently-reinforced operant task than did control injections of distilled water. However, no significant correlation was found between the freezing scores of the drug Ss and their depressed operant rate. These results were discussed in relationship to the amphetamine-induced reduction of freezing which has been observed in the CAR task.
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References
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Cole, S.O. Amphetamine-induced freezing in a food-motivated operant task. Psychon Sci 10, 269–270 (1968). https://doi.org/10.3758/BF03331514
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DOI: https://doi.org/10.3758/BF03331514