We assessed speech comprehension in a patient with cortical auditory disorder following bilateral cerebral lesions. While he benefited from lip reading, he showed noimprovement when context and stimulus rate were controlled. Performance was often variable, and the patient did not seem completely aware of his disturbance. Reported cases of cortical auditory disorder are inconsistent in the effects of these and other variables on speech comprehension. We present a systematic investigation of corticalauditory disorder in an attempt to offer insight into the speech comprehension deficitof aphasiain isolation of language production disturbances. © 1990, Taylor & Francis Group, LLC. All rights reserved.