The purpose of the research was to examine specific learning functions among people suffering schizophrenia and the relationship between the different aspects of intellectual disability and the severity of the mental illness. We hypothesized that (a) a lower level of basic learning functions among people with schizophrenia compared with the general population; (b) wide variance in the degree of damage to the respective functions; and (c) a correlation between the severity of the illness and the degree of intra-individual variance in learning functions.