Perception and visual processing

Perception

A salient or abrupt event can draw attention away from the current goal, with capture shaped by stimulus properties and the observer’s attentional set.

Perception

Substantial changes can go unnoticed when they occur during a visual interruption, across views, or outside focused attention.

Perception

Elements that move or change together tend to be perceived as belonging to the same group.

Perception

Visual perception organizes a scene into a focal figure and surrounding ground, with contrast and boundaries influencing which region receives focus.

Perception

Ambiguous visual input tends to organize into a stable, coherent form under the conditions present, often favoring relative simplicity or regularity.

Perception

Pictures are often remembered better than comparable words when they are recognizable, relevant, and tested under suitable conditions.

Perception

Some basic visual features can be detected rapidly across a display before focused inspection of each individual item.

Perception

Information that must be mentally integrated often benefits from perceptual proximity, while information needing separate treatment may benefit from separation.

Perception

Detection depends on both sensitivity to signal versus noise and a decision criterion that trades misses against false alarms.

Perception

Visual search performance depends on how a target is represented, how similar distractors are, and how attention is guided through the display.

Perception

Across an approximate range, the smallest detectable change in a magnitude often scales with the starting magnitude rather than remaining a fixed absolute amount.