The Behavior Problems Inventory-Short Form for individuals with intellectual disabilities: Part II: reliability and validity

• Published in: Journal of intellectual disability research Vol. 56; no. 5; pp. 546 - 565
• Main Authors: Rojahn, J., Rowe, E. W., Sharber, A. C., Hastings, R., Matson, J. L., Didden, R., Kroes, D. B. H., Dumont, E. L. M.
• Format: Journal Article
• Language: English
• Published: Oxford, UK Blackwell Publishing Ltd 01.05.2012; Wiley-Blackwell; Wiley Subscription Services, Inc
• Subjects: Aberrant Behavior Checklist; Adolescent; Adult; Aged; Aged, 80 and over; Aggression; Attention Deficit and Disruptive Behavior Disorders - diagnosis; Attention Deficit and Disruptive Behavior Disorders - epidemiology; Attention Deficit and Disruptive Behavior Disorders - psychology; Behavior disorders; Behavior Problems; Behavior Problems Inventory; Behavior Rating Scales; Check Lists; Child; Child Behavior; Child, Preschool; Construct Validity; Diagnostic Assessment for the Severely Handicapped; Discriminant analysis; England; Factor Structure; Female; Foreign Countries; Humans; intellectual disabilities; Intellectual Disability - diagnosis; Intellectual Disability - epidemiology; Intellectual Disability - psychology; Inventory for Client and Agency Planning; Learning disabilities; Male; Measures (Individuals); Mental Retardation; Middle Aged; Netherlands; Personality Inventory - standards; Personality Inventory - statistics & numerical data; Psychological tests; Psychometric properties; Psychometrics; Psychometrics - standards; Psychometrics - statistics & numerical data; Rating Scales; Reliability; Reproducibility of Results; Romania; Scores; Self Destructive Behavior; Self-Injurious Behavior - diagnosis; Self-Injurious Behavior - epidemiology; Self-Injurious Behavior - psychology; Severe Disabilities; Severity of Illness Index; Stereotypes; Stereotypic Movement Disorder - diagnosis; Stereotypic Movement Disorder - epidemiology; Stereotypic Movement Disorder - psychology; United States; Validity; Wales; Young Adult; United Kingdom (Wales); Netherlands; Romania; United Kingdom (England); United States; England; United Kingdom > UK; United States > US; Wales
• ISSN: 0964-2633; 1365-2788
• DOI: 10.1111/j.1365-2788.2011.01506.x

Background  The Behavior Problems Inventory‐01 (BPI‐01) is an informant‐based behaviour rating instrument for intellectual disabilities (ID) with 49 items and three sub‐scales: Self‐injurious Behavior, Stereotyped Behavior and Aggressive/Destructive Behavior. The Behavior Problems Inventory‐Short Form (BPI‐S) is a BPI‐01 spin‐off with 30 items. Methods  The psychometric properties of these two versions of the scale were computed using aggregated archival data from nine different sites in the USA, Wales, England, the Netherlands and Romania with a total of 1122 cases with a BPI‐01 total score >0. Results  The internal consistency of the BPI‐01 and the BPI‐S ranged from fair to excellent with the BPI‐01 showing slightly stronger reliability. Construct validity (confirmatory and discriminant) was computed by comparing BPI sub‐scale scores with the scores of four other behaviour rating scales (the Aberrant Behavior Checklist, the Diagnostic Assessment for the Severely Handicapped‐II, the Nisonger Child Behavior Rating Form and the Inventory for Client and Agency Planning). Strong evidence for confirmatory and discriminant validity was found for both the BPI‐01 and the BPI‐S. Confirmatory fit indices for the BPI and the BPI‐S were comparable and suggesting that the factor structures fit the data well. Conclusion  In summary, both BPI versions were found to be equally sound psychometrically and can be endorsed for future use. However, independent future studies are needed to replicate the psychometrics of the BPI‐S with new data.