Fig. 3.

Results from the stop-signal task (SST) evaluation, experiment 1. Baseline/saline: data from saline-administration sessions, three pre and three postnicotine dosing sessions. Initial dosing: means from the first 3 days of 0.3 mg/kg nicotine dosing. Repeated dosing: final 3-day nicotine-dosing means. Repeated nicotine administration did not change in mean reaction times or mean percent correct go-trial performance. A significant disruption in percent correct stop-trial performance was noted for the 60% stop-signal delay (SSD) after consecutive dosing with 0.3 mg/kg nicotine. mRT, mean go-reaction time. **P<0.01.