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  • Title: The Behavior Problems Inventory-Short Form for individuals with intellectual disabilities: part II: reliability and validity.
    Author: Rojahn J, Rowe EW, Sharber AC, Hastings R, Matson JL, Didden R, Kroes DB, Dumont EL.
    Journal: J Intellect Disabil Res; 2012 May; 56(5):546-65. PubMed ID: 22221562.
    Abstract:
    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.
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