Neuropsychological assessment and cognitive rehabilitation procedures desi gned for use with persons who are brain-injured can aid in understanding and rehabilitating persons with severe psychiatric disabilities. The present paper di scusses practical i ssues confronting rehabilitation psychologists as they borrow and modify these procedures with a psychiatric population. Sampl e data are offered to illustrate how cognitive testing can illuminate the rehabilitation task.Psychological assessment has contributed significantly to the rehabilitation of persons with severe psychiatric disabilities over the years. Intelligence testing, personality assessment, and vocational interest and aptitude tests have long helped some patients and their helpers make informed choices about the feasibility of pursuing certain vocational goals. More recently, psychological assessments have contributed to a better understanding of functional skills and deficits relative to community living (Anthony, 1980;Erickson, 1984;Wallace, 1986). In this article, I would like to take the discussion one step further by describing attempts to identify and address those cognitive deficits that undermine rehabilitation efforts with persons with severe psychiatric problems.A number of persons with psychiatric disability suffer from cognitive deficits comparable to those found among persons who are brain-injured (Erickson & Binder, 1986;Goldstein, 1978). First, cognitive deficits are particularly noteworthy among persons diagnosed as schizophrenic whose clinical pictures are dominated by "negative symptoms" such as impoverished speech and affect, attentional impairment, severe withdrawal, and lack of motivation (Andreason & Olsen, 1982). While the alleviation of florid positive symptomatology (marked by bizarre thinking and behavior) often improves mental status, subtle deficits in attention and concentration, learning and memory, psychomotor speed, and problem solving remain. Second, deficits associated with aging, substance abuse, concurrent medical prob-