Thirty patients currently in residence at a psychiatric inpatient facility, meeting DSM-III-R criteria for psychotic disorders and having religious delusions, were given the Hood Mysticism Scale, Knoblauch's Ego Grasping Oiientation Inventory (EGO Scale), and Raskin and Hall's Narcissistic Personality Inventory (NPI). Second, thirty senior members of various contemplative/mystical groups and thirty normalappearing hospital staff were given the same battery. Results were analyzed using a multivariate discriminant analysis. Contemplatives and Psychotics taken together could be separated from Normals, but not from each other, with the Hood Mysticism Scale. The Normals and Contemplatives taken together could be separated from the Psychotics, but not from each other, with the EGO Scale and the NPI. A twodimensional discriminant function based on the three tests correctly classified the Psychotics 92.6%, the Normals 79.3%, and the Contemplatives 70.0% of the time. For the Contemplative/Psychotic mixture taken alone, 90% of the Contemplatives and 92.6% of the Psychotics were correctly separated.