Left: Information from T. E. Robinson and J. B. Becker (1986). Enduring changes in brain and behavior produced by chronic amphetamine administration: A review and evaluation of animal models of amphetamine psychosis. Brain Research Reviews, 397, pp. 157–198. Right: Information from I. Q. Whishaw, G. Mittleman, and J. L. Evenden (1989). Training-dependent decay in performance produced by the narcoleptic cist(Z)-flupentixol on spatial navigation by rats in a swimming pool. Pharmacology, Biochemistry, and Behavior, 32, pp. 211–220.