Figure 1.

Stimulus and task. A, Trial sequence: the black panels represent the screen and stimuli. In blocks of trials, the response event was either a transient direction or color change (see Materials and Methods for details). B, Color-rank selection rules: Rule #1: red > blue > green, rule #2: green > blue > red. For both rules, target probability scaled from 100% to 50% to 0% along the scale from left to right.