Figure 3.

Stimuli and methods of Experiment 1. (A) Trial procedure of the appearance discrimination task. The eidolons were presented either before (presaccadic condition) or after a saccade (postsaccadic condition). Participants had to compare the blur of the eidolon in one trial with the overall average blur of all previous trials. (B) Example psychometric functions for a participant show the proportion of blur-lower responses over coherence from 0.1% to 0.9% (high to low blur), in presaccadic (black) and postsaccadic (gray) conditions. Vertical lines indicate the points of subjective equality (PSE). (C) Trial procedure of the change discrimination task. The blur either increased or decreased during a saccade. Participants had to indicate the direction of change. (D) Example psychometric functions for a participant showing the proportion of blur-increase responses over coherence changes for blank (gray) and no blank (black) conditions. Negative values indicate a decrease in blur, positive values indicate an increase in blur. Vertical lines represent points of subjective stability (PSS). Note that on the y-axis label the proportion blur increase is indicated with an arrow to differentiate it from proportion blur lower (than mean) responses in (B). On the x-axis label, the blur decrease to increase is indicated with arrows to differentiate it from high to low blur in (B).