[A test of progressive enrichment of visual information (results in 102 patients with cerebral lesions) (author's transl)].

A new test is reported in which probabilistic activity is imposed on the subject in order to identify the visual stimuli presented to him. The test was validated in 109 normal subjects. When applied to 102 patients with focal cerebral lesions it demonstrated that all lesions of the right hemisphere provoked erroneous or delayed responses and that only lesions in the left occipital region produced the same effects.