Comparison between changes of mind and performance improvement for two and four alternatives.

<p>Changes of mind are displayed as percentage of all valid trials. In the top row (A–D) the data for two and four choice alternatives is shown separately in black and red. As the percentage of changes of mind did not vary significantly between the two experimental conditions, we also plotted the average data in the bottom row (E–H) to emphasize the dependence of changing on the motion coherence. (A,E) Percentage of changes of mind at 0% motion coherence. (B,F) Correcting changes, that is changes from an initially wrong to the correct R-target. (C,G) Erroneous changes from correct to wrong. Given four choice-alternatives, also changes between two wrong R-targets occurred (w→w, dashed line in C and G). For an overall comparison, the bar plots indicate the average of all correcting (B) and erroneous (C) changes of mind for two and four choice alternatives. (D, H) Performance improvement through changes of mind (absolute difference of initial and final performance considering changes of mind). Participants' accuracy consistently improved with changes of mind, especially for intermediate coherence levels. The performance gained through changes of mind was comparable for the different number of possible choices.