title: The Splitting Index: construction of a scale measuring the defense mechanism of splitting.
abstract: The Splitting Index (SI), a self-report scale based on the writings of Kernberg (e.g., 1976) on self and object representations and the defense mechanism of splitting, was constructed. After development over the course of 6 pilot studies, the SI was validated through 2 further studies. Factor analyses revealed a 24-item scale with three 8-item subscales, measuring the splitting of self, family, and others' images. The SI and its subscales were demonstrated to be internally consistent and stable over a 4-week period. Convergent validity was supported by significant correlations with measures of borderline and narcissistic personality disorders, self-image stability, self-esteem, depression, and negative affectivity. Discriminant validity was demonstrated by near-zero correlations with two measures of cognitive complexity. Contrary to predictions, the SI was significantly correlated with the Dogmatism Scale (Rokeach, 1960), a third measure of cognitive complexity. Research and clinical applications of the SI are discussed.
authors.affiliation: Department of Psychology, University of Texas, Austin 78712, USA.
authors.forename: J R
authors.initials: JR
authors.lastname: Gould
authors.forename: N M
authors.initials: NM
authors.lastname: Prentice
authors.forename: R C
authors.initials: RC
authors.lastname: Ainslie
mesh_terms: D000328:Adult; D003674:Defense Mechanisms; D005190:Family / Q000523:psychology; D005260:Female; D006801:Humans; D007398:Interpersonal Relations; D008297:Male; D009769:Object Attachment; D010554:Personality Disorders / Q000175:diagnosis* / Q000523:psychology; D010555:Personality Inventory / Q000706:statistics & numerical data*; D010865:Pilot Projects; D011594:Psychometrics; D015203:Reproducibility of Results; D012649:Self Concept