Fig. 3.

Illustration of the trial sequence of Experiment 2. Participants were instructed to search for the shape singleton (target; e.g., diamond among circles) and report the identity of a letter within the target. The appearance of a particularly colored shape (distractor; e.g., red circle) signaled that a high reward could be earned while the appearance of a differently colored shape (e.g., blue circle) signaled a low reward. Participants were informed about the color-reward relationship but were instructed to ignore it and to focus on searching for the target shape. Note that the ISI of 250 ms between the search display and feedback is not shown