Figure 2. Example of the mask and the results for Experiment 1b.

(A) Pattern mask used in the current experiment. (B) and (C) Accuracy and reaction times (RT) for the match-mismatch task, respectively. The * and ns show the result of planned contrast between the three types of change and no change. * means the difference is significant, whereas ns means the difference is nonsignificant. (D) The ERPs recorded at FZ and FCZ. All the three types of change elicited N270 relative to no change.