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Abstract
The psychometric properties of a German version of the Questions About Behavioral Function Scale (QABF) (CitationMatson & Vollmer, 1995) were examined in a sample of 522 individuals with intellectual disabilities residing in large facilities participated. The factor structure was first examined by exploratory factor analysis, yielding a five-factor-solution that was identical to the one described by the authors of the QABF and was statistically and clinically meaningful. Furthermore the factor structure was validated by confirmatory factor analysis. Fit indices indicated satisfactory model fit. Internal consistency was found to be good with Cronbach's alphas ranging from .84 to .62.
Interrater reliability was fair with intraclass correlations ranging from .66 to.58.
ACKNOWLEDGMENT
We thank Dr. Johannes Rojahn for several rounds of helpful suggestions in the preparation of this article.
Notes
Bienstein, P., & Nussbeck, S. (in press). Diagnostik bei selbstverletzendem Verhalten und intellektueller Beeinträchtigung [Functional assessment of selfinjurious behavior in institutions for persons with intellectual disability]. Zeitschrift für Kinder‐und Jugendpsychiatrie und Psychotherapie. Journal of Child and Adolescent Psychiatry and Psychotherapy. Manuscript submitted for publication.