Figure 1.

Example trials. On each trial, the participant’s task is to report the orientation of the notch for the item with the odd color. In the first trial the target is white and the distractors are black, whereas in the second trial the target feature is repeated (the target is still white), but the distractor feature is novel (blue). Therefore, we refer to the second trial as rTnD (repeated target, novel distractor). Priming of pop-out refers to effects where people are faster for repeated features and slower when roles are reversed (e.g., the feature that designated a distractor in the previous trial now indicates a target).