Rapid acquisition of the spatial reversal water task. A, Performance of the seventh session and seventh session-reversal groups during pretraining. Rats were given two training sessions per day, separated by 30 min, for 3 d.B, Final session performance for all experimental groups. Performance between all groups was different on trial 1 (p < 0.01; ANOVA with Fischer'spost hoc analysis). See Materials and Methods and Results for additional details. n = 6 rats per group.