Table 2.

Summary Statistics for Distribution of Head Entries during the CS across Training Sessions in VTA Manipulation Experiments

		Control		Halo		Comparison between Control and Halo
	Session	Slope Mean (SEM)	p Value of Comparison to Session 1	Slope Mean (SEM)	p Value of Comparison to Session 1	Z Value	p Value
VTA GABAergic manipulation	1	0.01 (0.18)	—	0.62 (0.31)	—	—	—
	2	0.46 (0.17)	0.161	0.14 (0.31)	0.339	−1.64	0.102
	3	0.87 (0.18)	0.008	−0.20 (0.38)	0.098	−2.97	0.003
	4	1.86 (0.29)	<0.001	0.83 (0.33)	0.669	−2.89	0.004
	5	1.80 (0.28)	<0.001	0.63 (0.41)	0.973	−3.13	0.002
VTA glutamatergic manipulation	1	0.28 (0.17)	—	−0.35 (0.17)	—	—	—
	2	0.35 (0.15)	0.821	−0.27 (0.19)	0.798	0.02	0.985
	3	0.84 (0.24)	0.071	0.27 (0.22)	0.048	0.10	0.917
	4	1.87 (0.20)	<0.001	−0.02 (0.26)	0.287	−2.87	0.004
	5	2.78 (0.31)	<0.001	0.25 (0.24)	0.052	−4.31	<0.001
VTA dopaminergic manipulation	1	−0.19(0.14)	—	−0.28 (0.19)	—	—	—
	2	0.41 (0.14)	0.07	0.18 (0.15)	0.253	−0.27	0.786
	3	0.67 (0.22)	0.01	0.54 (0.21)	0.041	−0.07	0.946
	4	1.47 (0.29)	<0.001	1.09 (0.34)	0.001	−0.53	0.594
	5	1.77 (0.31)	<0.001	1.05 (0.42)	0.001	−1.22	0.222