Table 2.

Full statistics report of the main mixed-effects regression model for choice data, and follow up simple effects analysis to characterise the treatment effect.

	ß estimates	SE	χ2	p value
Main effects
valence	−0.801	0.15	27.4	<0.001***
required action	1.954	0.20	95.3	<0.001***
drug	−0.091	0.08	1.4	.2
site	−0.006	0.12	<0.01	1
Interaction effects
required action × valence	−0.010	0.07	0.02	0.9
drug × site	0.061	0.08	0.6	0.4
valence × drug	−0.200	0.08	6.1	0.01*
valence × site	0.139	0.14	0.8	0.4
required action × drug	0.102	0.12	0.8	0.4
required action × site	0.570	0.20	8.1	0.004**
valence × drug × site	0.070	0.08	0.8	0.4
required action x drug x site	−0.991	0.12	0.7	0.4
valence × required action × drug	0.032	0.06	0.3	0.6
valence × required action × site	0.039	0.07	0.3	0.6
valence × req. action × drug x site	0.007	0.06	0.01	0.9
Post hoc simple effects (Win – Avoid)
Placebo	−0.954	0.19	26.4	<0.001***
Tolcapone	−0.583	0.14	14.7	<0.001***

SE = standard error.

Significance * ≤ 0.5, ** ≤ 0.1, *** ≤ 0.001.