Trials to criterion, latency to criterion, trial omissions, lever press reaction time, variability in reaction time, choice accuracy, and error subtypes during the set shift phase in adolescent WKY, WIS, and SHR following vehicle or d-amphetamine treatment (Mean ± SEM). * p ≤ 0.05 compared to both other strains. & p ≤ 0.05 compared to WKY overall. $ p ≤ 0.05 compared to vehicle-treated WKY. ^ p ≤ 0.05 compared to vehicle-treated SHR.