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The Behavior Problems Inventory-Short Form for individuals with intellectual disabilities: part II: reliability and
J Rojahn1, E W Rowe, A C Sharber
1Center for Cognitive Development, George Mason University, Fairfax, Virginia 22030-4444, USA. jrojahn@gmu.edu
Journal of Intellectual Disability Research : JIDR
|January 7, 2012
Summary
The Behavior Problems Inventory-01 (BPI-01) and its short form (BPI-S) demonstrate sound psychometric properties for assessing behavioral issues in individuals with intellectual disabilities (ID). Both versions are reliable and valid, supporting their use in clinical and research settings.
Area of Science:
- Psychometrics
- Behavioral Science
- Intellectual Disabilities Research
Background:
- The Behavior Problems Inventory-01 (BPI-01) is a 49-item informant-based tool for assessing behavior problems in intellectual disabilities (ID).
- The Behavior Problems Inventory-Short Form (BPI-S) is a condensed 30-item version derived from the BPI-01.
Purpose of the Study:
- To evaluate the psychometric properties of the BPI-01 and the BPI-S.
- To determine the reliability and validity of both BPI versions for use in ID populations.
Main Methods:
- Psychometric properties were assessed using aggregated archival data from 1122 cases across nine international sites.
- Internal consistency and construct validity (confirmatory and discriminant) were computed for both BPI versions.
Main Results:
- Both BPI-01 and BPI-S exhibited fair to excellent internal consistency, with BPI-01 showing slightly higher reliability.
- Strong evidence for confirmatory and discriminant validity was found for both scales, with comparable factor structure fit indices.
Conclusions:
- The BPI-01 and BPI-S are psychometrically sound and suitable for future use.
- Further independent studies are recommended to replicate the psychometric findings for the BPI-S.
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