This article describes the Neuropsychological (NP) functioning of 71 psychiatrically hospitalized male prisoners. Demographic description, patterns of drug use, patterns of violence, psychiatric diagnosis, and performance on the Halstead-Reitan Neuropsychological Battery (HRNB) are described.

Using age and education adjusted norms (Heaton, Grant, & Matthews, 1991), 84% of this sample demonstrated impairment on the Halstead Impairment Index. Sensory Exam-Left, Tapping Dominant and Non-Dominant, Speech Perception, Tactual Performance Test Times/Memory/and Location, Trailmaking A and B, and Category Test were all impaired. Multivariate Analyses (MANOVAS) demonstrated significantly impaired performance on tasks of Motor, Psychomotor, and Reasoning, with FTT-Dominant, TPT-Total, and Category Test contributing the most meaningful contribution to the multivariate effect. Varimax Rotated Principle Components Analysis revealed a five-factor model (Motor, Learning, Attention, Abstraction, and Processing Speed), which accounted for 69.9% of the total variance.

Need for further research, and implications for the use of this information in developing treatment programs for psychiatrically disturbed prisoners are discussed.