Table 1.

Effects of drug administration in Experiment 1 on trial omissions, locomotion, and shock reactivity

Drug	Omissions (forced choice trials)	Omissions (choice trials)	Locomotion (locomotor units/ITI)	Shock reactivity (locomotor units/shock)
SKF81297
sal	0.50	0.83	39.14	2.74
0.1 mg/kg	0.42	0.50	37.27	2.92
0.3 mg/kg	0.58	0.17	39.77	3.07
1.0 mg/kg	3.83	4.17	37.55	3.07
SCH23390
sal	0.58	0.5	29.12	3.00
0.005 mg/kg	0.42	0.42	26.97	2.85
0.01 mg/kg	0.58	0.33	24.78	2.59
0.03 mg/kg	3.67	7.50**	17.61*	2.60
Bromocriptine
sal	1.50	0.25	34.46	2.91
1.0 mg/kg	3.83	2.50	28.86	2.98
3.0 mg/kg	4.75	5.83	30.14	3.02
5.0 mg/kg	5.58*	6.08	26.57	2.68
Eticlopride
sal	3.42	0.17	28.75	2.75
0.01 mg/kg	2.58	2.67	25.15	2.67
0.03 mg/kg	3.75	2.75	24.80	2.59
0.05 mg/kg	4.92	3.58	24.58	2.68
Amphetamine/SCH
sal/sal	0.33	0.00	37.48	2.51
amph/sal	4.33*	3.67	65.06**	2.57
amph/SCH	4.92*	3.25	48.14	2.83
Amphetamine/eticlopride
sal/sal	5.42	0.33	33.44	2.34
amph/sal	11.25**	2.25	59.73**	2.57
amph/eticlopride	9.75*	2.75	46.31*	3.13

sal, saline; amph, amphetamine.

*p < 0.05 compared to saline;

**p < 0.01.