Milner has reported that lesions of the right temporal lobe impair performance on certain visual tests, whereas lesions of the left temporal lobe do not. In a comprehensive comparison of patients with damage to the temporal, frontal, and parietal areas the right temporal group was found to be impaired on a Triangular Blocks test8 and on a complex pictorial task, the McGill Picture Anomalies.9 The deficit on the McGill Picture Anomalies was specific to the right temporal group. Milner suggested that these deficits are related to the nonverbal functions of the right hemisphere and concluded that "the right temporal lobe aids in rapid visual identification."9 The nature of this facilitation has remained a problem, since lesions of the right temporal lobe do not impair performance on all visual tests nor exclusively on visual tests. The present study was designed to investigate this visual deficit further.