Fig. 1.

Mean nose pokes are shown as a function of the 4 days of conditioning (D1 to D4) for the 5 s of the inter-trial interval (ITI) just prior to conditioned stimulus (CS) presentation (Pre-CS) as compared with during the 5-s CS presentation or in the 5-s post-CS when food was delivered (US). Diamonds denote rats conditioned at the 10-s trace interval, and circles denote rats conditioned at the 2-s trace interval after treatment with SKF81297 (s.c.) at 0.8 mg/kg (black fill) or 0.4 mg/kg (grey fill) in experiment 2. Control rats (white fill) were injected with saline