THIS STUDY was designed to investigate possible relationships between electroencephalographic (EEG) patterns and various aspects of cognitive functioning. Kooi and Hovey1 reported a study in which 21 epileptic subjects performed psychological tests while the EEG was being recorded. Verbal questions and answers were recorded simultaneously. Nonanswer responses included temporary loss of goal idea, transient inattention, or direct admission of confusion. The authors concluded that disturbance in higher mental processes is significantly associated with paroxysmal activity.
We proposed to test whether there is a positive relationship between an abnormal EEG and persistent impaired abstract thinking or tendency to concrete thinking. In this preliminary investigation, 41 psychiatric patients were selected in order of admission to an open ward in a VA general medical and surgical hospital. Open-ward patients were used since an earlier review of routine EEG's done in a one-year period revealed that, of 128 records obtained, 52 were