15 right-brain-damaged, 15 left-damaged, and 15 normal Ss were given visual matching tasks in which the target stimuli became more complex with the successive addition of discriminanda. In Task A the alternates were in the same orientation as the target, in Task B they were rotated. In both tasks, normals were superior to the brain-injured Ss (p < .01); left-damaged were slightly inferior to right-damaged on Task A, and significantly (p = .05) inferior on Task B. There were no differences in identification times except for the comparison normals vs left-damaged on the simpler stimuli of Task A, where the brain-damaged were slower. For left-damaged Ss, performance on Task B was correlated with education, Motor Impersistence, and verbal integrity.
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