FIG. 8.

Effects of IT microstimulation on reaction times. A: pooled reaction times for ambiguous trials for the response to the stimuli mixture from 1 of which had been previously been associated with microstimulation show that microstimulation affected choice times. Choice reaction times were speeded for stimulated trials in which the monkeys chose the predicted (microstimulation associated) stimulus and were slowed by microstimulation on trials in which the animals chose the unpredicted stimulus (choice × stimulation interaction, monkey S; P < 0.001, monkey T; P < 0.01). Error bars denote 95% confidence intervals. B: pooled reaction times for ambiguous trials in response to the mixtures containing images neither of which had been previously been associated with microstimulation. These data do not show the systematic bias observed for the associated mixtures (choice × stimulation interaction, monkey S; P > 0.2, monkey T; P > 0.1).