Assessing cognitive-related disability in schizophrenia: Reliability, validity and underlying factors of the evaluation of cognitive processes involved in disability in schizophrenia scale

AbstractPurpose: We have developed a new scale that assesses disability caused by cognitive impairments in schizophrenia, in order to evaluate the functional impact of schizophrenia and help the prescription of rehabilitation interventions. The aim of the study was to assess its psychometrical properties.Materials and methods: Mental healthcare professionals and relatives of individuals with schizophrenia developed and rated the evaluation of cognitive processes involved in disability in schizophrenia scale, which included 13 items. Its construct validity was assessed through a factorial analysis; its concurrent validity was evaluated based on ecological outcomes, its convergent validity was tested against the World Health Organization Disability Assessment Schedule (WHODAS II), and its reliability was estimated based on internal consistency and inter-rater reliability.Results: Overall, 215 patients were included. Our findings supported a two-factor structure which accounted for 46% of the variance. The i...