5 rats, previously trained to a criterion on drl, were tested, in 3 replications, with injections of tragacanth on 2 days and of magnesium pemoline on 1 day. Magnesium pemoline significantly impaired drl performance, but there were no significant changes within each session not as a function of replications.
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References
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BeachG.KimbleD. P.Activity and responsivity in rats after magnesium pemoline injections. Science, 1967, 155, 698–701.
