Figure 1.

Procedure, stimuli, and DSOA distribution

(A) Example of a trial. The duration of the different stimuli is reported under each panel. In this example, the distractor is presented as an empty square (9 by 9 pixels) and had a negative DTOA (presented before the target), and the target is presented 7° above the fixation.

(B) Display sequence. The fixation point disappears as soon as the target appears. The time 0 refers to the target onset. Relative to target onset, the distractor could appear from 150 ms before the target to 100 ms after the target (DTOA = Distractor to Target onset asynchrony). The time distance between the distractor offset and the saccade onset (yellow arrow) is the distractor offset-to-saccade onset asynchrony (DSOA).

(C) Distractor stimuli of the experimental condition—optimal and non-optimal features. Upper panel: Set of 50 optimal features considered as high salient features by the reference model.³⁸ Lower panel: Set of 50 non-optimal features considered low salient features by the reference model.³⁸ The features used here are those with the lowest probability in the statistical distribution of all possible 512 3 × 3-pixel black and white features.

(D) DSOA distribution for each distractor condition. Data are binned every 20ms.