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Visual perceptual assessment
- 2. What is visual perception It refers to information that is perceived through eyes Perception refers to the interpretation of what we are taking in through senses to form meaning full of the environment. The dynamic process receiving the environment through sensory impulses and translating those impulses into meaning based on a previously developed understanding of that environment(Bouska at.,1990) Perceptual function is the interpretation of visual sensory information. If a problem exists in this area, it can affect the child’s performance in areas of occupation(Lee, 2006).
- 3. What is visual perceptual process Visual foundation skills: visual oculomotor movements, visual fields and visual acuity. Visual attention Visual scanning Visual pattern recognition Visual memory Visual cognition Adaptation through vision Note: need to be addressed properly before we start functional task with kids such as play, leisure, reading, writing, ADL, social interaction.
- 4. Purpose of assessment To identify limitation in activity or occupation. To link that limitation to presence of a visual impairment. To develop appropriate intervention plan based on assessment.
- 5. Visual attention is the ability to attend to visual stimuli. It involves alertness, selective attention, vigilance, and divided attention. Scanning is pattern recognition dependent on organized, thorough scanning of them visual environment. The retina must record all of the detail of the scene systematically through the use of a scan path. Pattern recognition is the ability to store information in memory requiring pattern detection and recognition. This is the identification of the salient features of an object, including the configurable aspects (i.e., shape, contour, and general features) and the specific features of an object (i.e., details of color, shading, and texture).
- 6. Visual memory is the mental manipulation of visual information needed for visual cognition and requires the ability to retain the information in memory for immediate recall or to store for later retrieval. Involves integrating visual processing information with past experience (both long term and short term). Visual cognition is the ability to mentally manipulate visual information and integrate it with other sensory information to solve problems, formulate plans, and make decisions.
- 7. Evaluator needs to address before evaluation starts Assessment must be familiar environment based such as pictures. Child must be instructed with an example before actual test starts. Distraction free environment. Test should start from structure to unstructured way. Difficulty level should be graded once child complete a task quickly and accurately.