The Brief Core Schema Scales (BCSS): psychometric properties and associations with paranoia and grandiosity in non-clinical and psychosis samples

• Published in: Psychological medicine 2006-06, Vol.36 (6), p.749-759
• Main Authors: FOWLER, DAVID, FREEMAN, DANIEL, SMITH, BEN, KUIPERS, ELIZABETH, BEBBINGTON, PAUL, BASHFORTH, HANNAH, COKER, SIAN, HODGEKINS, JOANNE, GRACIE, ALISON, DUNN, GRAHAM, GARETY, PHILIPPA
• Format: Article
• Language: English
• Subjects: Adult; Adult and adolescent clinical studies; Biological and medical sciences; Cognition & reasoning; Cognition Disorders - diagnosis; Cognition Disorders - epidemiology; Cognitive Behavioral Therapy; Factor Analysis, Statistical; Female; Humans; Male; Medical sciences; Neuroses; Original Article; Other psychotic disorders; Paranoia; Paranoid Disorders - diagnosis; Paranoid Disorders - epidemiology; Paranoid Disorders - therapy; Personality Disorders - diagnosis; Personality Disorders - epidemiology; Psychological tests; Psychology. Psychoanalysis. Psychiatry; Psychometrics; Psychometrics - statistics & numerical data; Psychopathology. Psychiatry; Psychoses; Psychosis; Psychotic Disorders - diagnosis; Psychotic Disorders - epidemiology; Psychotic Disorders - therapy; Self Concept; Self image; Selfesteem; Surveys and Questionnaires
• ISSN: 0033-2917; 1469-8978
• DOI: 10.1017/S0033291706007355

Background. Traditional instruments that measure self-esteem may not relate directly to the schema construct as outlined in recent cognitive models. The Brief Core Schema Scales (BCSS) aim to provide a theoretically coherent self-report assessment of schemata concerning self and others in psychosis. The scales assess four dimensions of self and other evaluation: negative-self, positive-self, negative-other, positive-other. Method. We analysed the psychometric properties of the BCSS using a sample of 754 students recruited by email and 252 people with psychosis recruited as part of a trial of cognitive therapy. We report the internal consistency, stability and the factor structure of the scale, and the association of the BCSS with measures of self-esteem and with symptoms of paranoia and grandiosity. Results. The BCSS have good psychometric properties and have more independence from mood than the Rosenberg Self-Esteem Schedule. People with chronic psychosis reported extreme negative evaluations of both self and others on these scales, but their levels of self-esteem and positive evaluations of self and others were similar to the student sample. Conclusions. Extreme negative evaluations of self and others appear to be characteristic of the appraisals of people with chronic psychosis, and are associated with symptoms of grandiosity and paranoia in the non-clinical population. The BCSS may provide a more useful measure of schemata about self and others than traditional measures of self-esteem.