| Popis: |
Three squirrel monkeys received extensive training under a concurrent free-operant avoidance, fixed-ratio escape schedule. The independent effects of D-amphetamine and chlorpromazine were assessed over a range of dose levels. The effects of D-amphetamine (0.03, 0.1, 0.3, and 1.0 mg/kg) on each monkey were dependent upon the subjects' control rates of responding. However, there was a clear rate-increasing effect on a relatively low rate of responding, and a rate-depressant effect on high response rates. |
