Figure 2.

Accuracy, Reaction Time, and Confidence for First Decisions

The top and middle rows show the proportion of correct decisions and reaction times as a function of motion strength on single first decisions (blue: D_1^∗ trials) and on first decisions on trials in which subjects made (or thought they would make) two decisions (red: D_1st and D_1st-catch trials). Solid lines are fits of a drift-diffusion model to each dataset. The bottom row shows the confidence ratings on correct (filled) and error (open) trials for both single first decision (blue: D_1^∗) and single-decision catch trials (red: D_1st-catch). Note that 0% trials have been designated as correct for plotting. Columns S1–S3 correspond to individual subjects. Error bars show SEM. See also Figure S1 and Table S1.