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.

VISUAL-SEARCH PERCEPTUAL DISORDER: “Brandon’s visual-search perceptual disorder often prevent him from finding his flight number and departure time on a digital airtime board, so he solves this problem by asking a staff member for assistance. “