Table 1.

Mean latencies (s) to nosepoke for the initiation of a trial and to choose a lever, following injection of vehicle, AMPH or 8-OH-DPAT. SEM is given in parentheses.

	AMPH (mg/kg)				8-OH-DPAT (mg/kg)
	Vehicle	0.3	0.6	1.0	Vehicle	0.3	0.6	1.0
LCR
Nosepoke	1.82 (0.25)	1.34 (0.14)***	1.72 (0.19)	1.77 (0.18)	1.55 (0.17)	1.87 (0.18)	2.42 (0.53)**	2.77 (0.48)***
Lever press	2.82 (0.26)	2.11 (0.23)**	2.71 (0.27)	2.68 (0.28)	2.50 (0.25)	2.92 (0.49)	3.90 (0.73)	4.64 (0.89)
HCR
Nosepoke	1.57 (0.14)	1.30 (0.10)	1.38 (0.10)	1.41 (0.11)	1.55 (0.10)	1.81 (0.12)	2.20 (0.19)	2.26 (0.24)
Lever press	2.33 (0.33)	2.07 (0.26)	2.29 (0.31)	2.28 (0.35)	2.47 (0.25)	3.34 (0.33)	5.25 (0.87)**	4.28 (0.82)

^**p<0.01

^***p<0.001, compared to vehicle