Figure 7.

Payoff and stimulus signals were derived from a linear additive model and stimulus signal matched the neutral LRP closely. A, Payoff and stimulus signals. The stimulus signal shows that stimulus information is manifested in the LRP only starting 200 ms after stimulus onset. The payoff signal shows that the payoff information is manifested as a prestimulus shift in activity toward the higher-paying alternative followed by a transient increase of activity toward the higher-paying altenative at ∼150 ms and ∼300 ms after stimulus onset. B, Stimulus signal versus the neutral LRP. The stimulus signal derived from the additive linear model of the unbalanced payoff condition is depicted alongside the LRP of the neutral condition. The two signals, originating from separate trial sets, match closely. The transparent shading around each line represents ± 1 SE around the mean.