Fig. 3.

Effects of isolation rearing and amphetamine on response control under both standard testing condition and long variable ITI lengths in 5-CSRTT. a. Amphetamine dose-dependently increased premature responding in both groups but IR rats were less impulsive. SR but not IR rats had more perseverative nose pokes under amphetamine challenge. b Social controls exhibited a greater magnitude of premature responding at longer ITIs and also a shift of the dose-response curve to the left earlier than isolates. For middle and right panels, the vertical bar represents the standard error for the difference between means (SED) taken from the error terms for the interaction between factors. See legend of Fig. 1 for detail