Slow cortical potentials capture decision processes during temporal discounting.

Repeated-measures anova on the relative frequency of impulsive choices revealed a highly significant main effect of amount ( F 1,16 = 99.85, P < 0.001, η 2 = 0.86), with more impulsive choices when the amount of the delayed reward was low, a highly significant main effect of delay ( F 1,16 = 83.93, P < 0.001, η 2 = 0.84), with more impulsive choices when the delay of the delayed reward was long, and a highly significant main effect of impulsivity ( F 1,16 = 40.26, P < 0.001, η 2 = 0.72).

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However, there was a marginally significant interaction between TF, amount, electrode, and impulsivity ( F 2.4,38.4 = 2.92, P = 0.06, η 2 = 0.15).

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