Table 1.

Statistical outcomes of analyses comparing performances associated with best doses of nicotine, and methylphenidate to performances associated with all vehicle sessions (“Best Dose”), performance associated with best vehicle sessions compared to remaining vehicle sessions (“Best Vehicle”), performances associated with best baseline sessions compared to remaining baseline sessions (“Best Baseline”), and performances associated with best dose, best vehicle, and best baseline sessions (“Best Dose, Best Vehicle, Best Baseline”).

	Nicotine	Methylphenidate
Delayed Matching-to-Sample
Best Dose (vs. All Vehicle)	F1,6=71.376, p<0.001	F1,6=21.987, p=0.003
Best Vehicle (vs. Other Vehicle)	F1,6=59.823, p<0.001	F1,6=28.727, p=0.002
Best Baseline (vs. Other Baseline)	F1,6=23.455, p=0.003	F1,6=42.273, p<0.001
Best Dose, Best Vehicle, Best Baseline	F2,12=0.365, p=0.702	F2,14=1.708, p=0.217
Self-Ordered Spatial Search
Best Dose (vs. All Vehicle)	F1,5=11.539, p=0.003	F1,5=8.468, p=0.033
Best Vehicle (vs. Other Vehicle)	F1,5=20.088, p=0.007	F1,5=8.468, p=0.033
Best Baseline (vs. Other Baseline)	F1,5=35.923, p=0.002	F1,5=7.288, p=0.043
Best Dose, Best Vehicle, Best Baseline	F2,10=1.065, p=0.381	F2,10=3.129, p=0.088