Twenty-four female hooded rats were randomly assigned to two amphetamine dosage levels (5 and 10 mg/kg) and three deprivation conditions (0, 12, and 24 hr.) to form six independent groups of four Ss each. The amount of food consumed during a 3-hr. feeding period was determined for four separate trials. On each trial the 3-hr. feeding period was preceded by a single injection of amphetamine and a single condition of food deprivation. There was a statistically significant interaction between dosage level of amphetamine and the different conditions of food deprivation. The implications of the results for previous studies and future research are briefly discussed.
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