Table 3.

Post-hoc tests examining the above 3×2×3 interactions

Region	Side	Post Hoc test	Condition	t	df	P	F
Caudate	L	ATT>HC	CD3	3.48	27	0.002	11.98
		NAT>HC	CD3	2.09	26	0.047	4.34
Middle Temporal Gyrus (BA39)	L	NAT>ATT	AB1	2.87	28	0.008	8.18
		NAT>ATT	AB3	2.36	28	0.026	5.53
		NAT>ATT	CD2	2.78	28	0.010	7.66
		ATT>HC	CD3	2.39	27	0.025	5.67
		NAT>HC	AB1	2.69	26	0.013	7.17
		NAT>HC	AB3	2.35	26	0.027	5.48
		NAT>HC	CD2	3.23	26	0.003	10.35
		NAT>HC	CD3	2.58	26	0.016	6.61
Hippocampus	L	NAT>ATT	CD2	2.96	28	0.006	8.72
		ATT>HC	AB2	2.20	27	0.037	4.84
		ATT>HC	CD3	2.76	27	0.010	7.57
		NAT>HC	AB1	2.32	26	0.029	5.35
		NAT>HC	AB2	3.13	26	0.004	9.69
		NAT>HC	AB3	2.56	26	0.017	6.53
		NAT>HC	CD2	4.05	26	0.0004	16.25
		NAT>HC	CD3	3.31	26	0.003	10.84
Medial Frontal Gyrus (BA10)	R	NAT>ATT	AB3	2. 27	28	0.031	5.14
		ATT>HC	CD1	2.35	27	0.027	5.48
		NAT>HC	AB3	3.14	26	0.004	9.79
Thalamus	R	NAT>ATT	AB3	3. 61	28	0.001	12.93
		NAT>HC	AB3	2.32	26	0.029	5.35
Fusiform Gyrus (BA37)	L	ATT>HC	CD3	2.52	27	0.018	6.33
Occipital Gyrus (BA19)	R	HC>ATT	CD2	2.43	27	0.022	5.88

For Condition, AB=high risk, CD=low risk, Numeral=block (e.g. AB=high risk choices in block 1)