Samples of Four Search Conditions (Target Is Red and Two Distractors Are Green in Current Trial).

<p>(a) Search Repeated (target color and distractor color are repeated across consecutive trials); (b) Search Switched (target color and distractor color are switched across consecutive trials); (c) Target-color Previewed (the current target color was the color of objects in the preceding non-target trial); and (d) Distractor-color Previewed (the current distractor color was the color of objects in the preceding non-target trial). Search Repeated and Search Switched conditions comprise the POP search task, and Target-color Previewed and Distractor-color Previewed conditions comprise the DPE search task.