Abstract
This study examined the construct validity of the Scale for Work-Personality Insufficiency (SWPI), developed by Nozu (2000), with an exploratory and confirmatory factor analysis (EFA and CFA). Study subjects were 550 adults with schizophrenia (mean age 43.7 yrs.), comprising ambulatory patients and users of intermediately facilities. Our EFA and CFA results supported a theoretically consistent three-factor structure of the scale representing comprehensive work performance, personal relationships and playing a role. Moreover, in analysis using a partial correlation analysis controlling for gender, age, hospital length of stay, number of admission to a psychiatric hospital, significant correlations emerged between psychiatric syndromes, intention to work, employment status and each domain scores of the SWPI, in an experientially consistent manner. These findings support the internal and external construct validity of the SWPI. Further research is suggested to test the other types of validity and reliability of the scale to verify its generalizability.
