Figure 3From: Behavioral variability, elimination of responses, and delay-of-reinforcement gradients in SHR and WKY ratsThe average distance of a hole-poke from the target hole, per 100 events (hole-pokes, visits to the water cup, and reinforcers) as a function of the number of reinforcers received during the first 6 sessions of FI 1 s. The acquisition curves are drawn by Equation 1.Back to article page