Participants are shown a pair of similar pictures separated by a blank interval. The pictures are identical except for one single aspect (e.g., a man is wearing a hat in one scene but not in the other). In these kinds of tasks participants often find it hard to detect the change. This phenomenon is known as change:

Question

Quizplus · Accepted Answer

The phenomenon described in the question is known as change blindness, which is the inability to detect changes between two similar scenes.

Participants Are Shown a Pair of Similar Pictures Separated by a Blank