VISUAL-SEARCH PERCEPTUAL DISORDER

a disorder demonstrated by trouble in finding a particular numeral within a random array on a board as an outcome of a lesion inside one cerebral hemisphere. Typically, participants' performances improve whenever the numeral sought is to the left of the midline. Involved parties with left-hemisphere injury additionally do improve whenever the numeral is left of the midline, whereas those with right-hemisphere injury have improved performances whenever the numeral is right of the midline.