The assessment of visuo-perceptual impairment after acquired brain injury is a difficult task in clinical practice. There are different reasons for this, the first being that, unless the deficit is so evident that it becomes a handicap for everyday living, many people who are visuo-perceptually impaired are normally not even aware of their impairment. Second, the tests and tasks used to evaluate or assess visual and perceptual functioning may lack the necessary accuracy to be able to detect subtle variations. Third, organizing a precise and effective neuropsychological assessment of visuo-perceptual functions requires a thorough understanding and knowledge of the concept and theory regarding these functions. And fourth, people sustaining brain injury normally have cognitive, emotional, and behavioural disorders that normally interact with the visuo-perceptual deficit, ...

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