Journal article

Numerical processing overcomes left neglect for the greyscales task

Andrea M Loftus, Michael ER Nicholls, Jason B Mattingley, John L Bradshaw

NEUROREPORT | LIPPINCOTT WILLIAMS & WILKINS | Published : 2008

Abstract

This study examined whether numerical cues affect spatial attention in left neglect. Patients with right parietal damage (four with neglect, three without) completed a dual task. Stimuli consisted of two greyscales overlayed with high numbers (8, 9), low numbers (1, 2) or neutral stimuli (musical sharp, &). Participants identified if the overlay was high, low or neutral and then made a relative luminance judgement for the greyscales. Neglect patients demonstrated a rightward greyscales bias in the neutral overlay condition, which was overcome by processing low numbers. Control patients showed a leftward bias in the neutral condition, which was overcome by processing high numbers. The results..

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