A, Visual search task. Each trial began with a fixation dot, followed by a placeholder display containing four identical Gabor patches. Afterward, a search display was presented and participants had to report the target orientation (i.e., left or right). In 66% of the trials, a color-singleton distractor appeared in the search display. B, Statistical learning manipulation. The distractor appeared more often in one hemifield (75%) than the other (25%). Each participant completed two sessions of the experiment (Day 1 and Day 2), with the distractor probabilities swapped between hemifields in the second session (adapted from Ferrante et al., 2023b).