An illusion of vision usually affecting spatial relations.

The misinterpretation of a real external, sensory experience.

Recognition and discrimination of the heaviness of a lifted object.

The sensory interpretation of the dimensions of objects.

The real or apparent movement of objects through the visual field.

The science dealing with the correlation of the physical characteristics of a stimulus, e.g., frequency or intensity, with the response to the stimulus, in order to assess the psychologic factors involved in the relationship.

Investigative technique commonly used during ELECTROENCEPHALOGRAPHY in which a series of bright light flashes or visual patterns are used to elicit brain activity.

The selecting and organizing of visual stimuli based on the individual's past experience.