Table 4.

Performance of each study group on gambling tasks

	Insular patients			Temporal patients			Healthy controls
Variable	n	Mean	s.d.	n	Mean	s.d.	n	Mean	s.d.	P-value	Posthoc comparisons
IGT
Learning phase (trials 1–40)	13	2.2	11.3	13	−3.5	8.2	20	−2.5	9.4	0.500
Test phase (trials 41–100)	13	13.7	16.2	13	−2.5	15.9	20	18.0	21.9	0.005	C > T; I > T
Cups Task
Sensitivity to EV − Gain	12	4.6	2.6	13	4.7	2.9	20	4.6	3.2	0.996
Sensitivity to EV − Loss	12	4.3	2.1	13	3.6	3.5	20	6.4	2.2	0.016	C > I; C > T

Note. One participant from the insular group could not complete the Cups Task due to a lack of time during the assessment session. P-values obtained from non-parametric Kruskal-Wallis tests for differences between the three groups. Posthoc comparisons indicate the direction of significant (P < 0.05) differences revealed by non-parametric Mann–Whitney tests performed between each pair of groups. C, healthy controls; I, insular patients; T, temporal patients.