VOSP

VOSP stands for the Visual Object and Space Perception battery, a neuropsychological assessment developed by Warrington and James to evaluate visual object recognition and visuospatial processing. It is used to assess perceptual abilities in individuals with brain injury or cognitive disorders and to help differentiate perceptual deficits from other cognitive impairments. The battery is relatively brief and designed to minimize motor demands and linguistic requirements.

The test comprises subtests organized into two domains: object perception and spatial perception. Object perception subtests assess recognition of objects under simplified or degraded conditions, including recognition of partially obscured or silhouetted objects and discrimination of real objects from non-objects. Spatial perception subtests examine a person’s ability to judge spatial relationships, such as the location and orientation of elements in space.

Scoring is typically based on accuracy and compared to normative data by age groups, with results interpreted relative to demographically matched norms. VOSP can aid in diagnosing and characterizing apperceptive versus associative visual agnosia and has been used in populations with stroke, head injury, dementia, and other neurological conditions.

Availability and use: The test has been widely adopted in clinical and research settings and is published in standardized form with administration guidelines and normative data. While valuable, performance can be influenced by factors such as attention, motivation, or general cognitive speed, so results are usually interpreted within a broader neuropsychological assessment.