Fig. 1.

Effects of schedule of reinforcement on PR performance. a The mean breakpoint for both schedule groups. b The duration of the post reinforcement pause (PRP). c The mean number of touchscreen responses made per reward was higher in animals reinforced with the PR4 schedule. d The group mean response rate for each trial, from the third trial onwards for both reinforcement schedule. e Reinforcing animals under a PREXP schedule significantly increases the predicted peak response rate. f Reinforcing rats under a PREXP schedule significantly increases the rate of decay in responding. Error bars represent ±SEM. *p < .05; **p < .01