Fig. 2From: Instrumental conditioning for food reinforcement in the spontaneously hypertensive rat model of attention deficit hyperactivity disorderExtinction of FR1. The SHR made more correct responses than both comparison strains (a), and fewer incorrect responses than the WKY (b), giving a higher discrimination index in the SHR (c). There were no strain differences for anticipatory responses (d), late responses (e), total on task activity (f), reaction time (g) or pellet collection time (h). Representative key shown in a Back to article page