Figure 2.

P1 results. A, Topographical figures mapping the differences between stimuli that were more frequently related to the high-value outcome (S^high) and to the low-value outcome (S^low) for all conditions. Relative scale (minimum/maximum values): −1/+1 μV. B, Magnitude of the P1 components for all conditions calculated as the mean activity at electrode Oz in the 130–200 ms time window. Error bars indicate within-participant SEM. C, Mean evoked activity locked to stimulus onset (100 ms baseline also shown) for the S^high and S^low at electrode Oz. Data are the result of averaging the three outcome devaluation conditions. Black lines represent the S^high minus S^low difference waveform. Shaded areas represent the SEM of this difference.