Fig 4.

Mean (±1 SEM) accuracy expressed as percent correct matches after scopolamine (4a) or phencyclidine (4c) and mean (±1 SEM) number of trials completed out of 100 possible after scopolamine (4b) or phencyclidine (4d) for five monkeys responding under a delayed matching-to-sample task. Abscissae: delay in seconds between the sample and comparison components, where x = 1 sec for all monkeys except Monkey AN where x = 3.2 sec (4a, 4c) and dose in mg/kg (4b, 4d). Filled symbols denote statistical significance (p<0.05) compared with saline. The shaded regions denote the 95% CI for saline.