Figure 2.

Effects of repeated administration of 0.56 or 1 μmol/kg (open bars) and 1 or 1.8 μmol/kg (hatched bars) of ALP alone, on response rate and percent errors in each component of the multiple schedule for three subjects. The bars indicate the mean values for at least 10 vehicle sessions and single determinations during repeated daily administration of ALP. The symbols represent the values for the individual subjects after the treatment with the respective doses of ALP. Monkeys A and G received daily administration of 1 (open bars) and 1.8 (hatched bars) μmol/kg, whereas monkey F received 0.56 (open bars) and 1 (hatched bars) μmol/kg of ALP. Note that monkey F received lower doses of ALP because this subject was more sensitive to the effects of ALP.