Cognitive deficits, more generally, are a negative, predictive factor in vocational rehabilitation, especially deficits in the working memory, but also in general intelligence and social cognition abilities. However, this is probably a result of the schizophrenia bias in rehabilitation research. Very few studies have looked at predictive factors for different diagnostic groups. Where this has been done, results show that these factors vary according to the diagnosis (Baer, 2002).