title: Two categorical stages of object recognition.
abstract: Visual object recognition was investigated in a group of eighty-one patients with right- or left-hemisphere lesions. Two tasks were used, one maximizing perceptual categorization by physical identity, the other maximizing semantic categorization by functional identity. The right-hemisphere group showed impairment on the perceptual categorization task and the left-hemisphere group were impaired on the semantic categorization task. The findings are discussed in terms of categorical stages of object recognition. A tentative model of their cerebral organization is suggested.
mesh_terms: D004292:Dominance, Cerebral; D005556:Form Perception; D006801:Humans; D011939:Mental Recall; D012660:Semantics