Judged: two independent readers; copy check clear.
common region
common region Common region is an extrinsic perceptual grouping factor in which separate visual elements are enclosed within the same surrounding area, leading them to be perceived more as a group.
Common region is an extrinsic perceptual grouping factor in which separate visual elements are enclosed within the same surrounding area, leading them to be perceived more as a group. In the cited study, placing targets within a single shared mask increased how often they disappeared and reappeared together, without changing overall disappearance time.