Figure 1From: Postnatal exposure to PCB 153 and PCB 180, but not to PCB 52, produces changes in activity level and stimulus control in outbred male Wistar Kyoto ratsStimulus control (percentage of responses on the reinforcer-producing lever) in the four groups. The vertical dotted line indicates when the contingencies changed from VI 3 s (sessions 8-12) to VI 180 s (sessions 13-33).Back to article page