A significant gender × age group interaction (Table 3) suggested that younger males [3.34 (0.03)] had highly significant increases in theta power [F = 23.62; p < 0.0001] compared to younger females [3.13 (0.03)], while older females [2.88 (0.03)], on the other hand, showed higher theta power [F = 4.63; p = 0.0315] than older males [2.78 (0.03)]. A significant gender × condition interaction revealed that a significant gender difference [F = 8.34; p = 0.0039] was observed only in the loss condition, where males [3.03 (0.03)] showed higher theta power than females [2.93 (0.02)]. Gender × condition × region interaction effect revealed that males had higher theta power than females only during the loss condition at frontal [male = 3.05 (0.03); female = 2.92 (0.03); F = 10.73; p = 0.0011] and central regions [male = 3.05 (0.03); female = 2.92 (0.03); F = 11.38; p = 0.0008]. Further, this 3-way interaction suggested that males showed higher theta power during loss compared to gain (loss > gain) in frontal regions [loss = 3.05 (0.03); gain = 2.94 (0.03); F
