Functional Impairment in Children With Externalizing Behavior Disorders: Psychometric Properties of the Weiss Functional Impairment Rating Scale–Parent Report in a German Clinical Sample. Issue 13 (November 2019)

• Record Type: Journal Article
• Authors: Dose, Christina; Hautmann, Christopher; Doepfner, Manfred
• Is Part Of: Journal of attention disorders. Volume 23:Issue 13(2019)
• Page Start: 1546
• Page End: 1556
• Publication Date: 2019-11
• Subjects: externalizing behavior disorders -- children -- functional impairment -- Weiss Functional Impairment Rating Scale -- psychometric properties; Attention-deficit hyperactivity disorder -- Periodicals; Attention -- Periodicals; 616.8589
• DOI: 10.1177/1087054716661234
• Languages: English
• ISSNs: 1087-0547

Abstract

Objective: To examine the psychometric properties of a German adaptation of the Weiss Functional Impairment Rating Scale–Parent Report (WFIRS-P) in a clinical sample of children (4-12 years) with externalizing behavior disorders.Method: Data were collected within two clinical trials ( N = 264). Factorial validity, reliability, and divergent validity from symptoms of ADHD and oppositional defiant disorder (ODD) were assessed.Results: Confirmatory factor analyses revealed that a bifactor model consistent with the theoretical assumption of a general construct of impairment (total scale) and additional specific factors (subscales) provided satisfactory data fit. Model-based reliability estimates showed that both the general construct and specific factors accounted for item variance. Internal consistencies were >.70, part–whole corrected item–scale correlations mostly >.30. Correlations between the WFIRS-P Scales and ADHD and ODD symptoms were low to moderate.Conclusion: The results support the factorial validity, reliability, and divergent validity of the WFIRS-P.