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Confirming the Tripartite Factor Structure of the Diagnostic Adaptive Behavior Scale
Marc J Tassé1, Robert L Schalock2, Patricia Navas3
1The Ohio State University, Columbus, OH.
American Journal on Intellectual and Developmental Disabilities
|August 12, 2026
Summary
The Diagnostic Adaptive Behavior Scale (DABS) reliably measures conceptual, social, and practical skills, aligning with major diagnostic systems for intellectual disability. This validated tool supports accurate assessment of adaptive behavior crucial for diagnosis.
Area of Science:
- Psychology
- Developmental Psychology
- Clinical Psychology
Background:
- Adaptive behavior is a key diagnostic criterion for intellectual disability.
- Major diagnostic systems define adaptive behavior using conceptual, social, and practical skill domains.
- Existing measures often lack alignment with this tripartite model.
Purpose of the Study:
- To validate the Diagnostic Adaptive Behavior Scale (DABS) using the tripartite model of adaptive behavior.
- To confirm the DABS's reliability and validity in assessing adaptive skills.
Main Methods:
- Confirmatory factor analysis was employed to test the tripartite model of the DABS.
- Internal consistency was calculated for each domain of the DABS.
Main Results:
- Confirmatory factor analysis supported the tripartite model of adaptive behavior within the DABS.
- The DABS demonstrated excellent internal consistency, with coefficients ranging from .97 to .99 for all domains.
Conclusions:
- The DABS is a reliable and valid measure for assessing conceptual, social, and practical adaptive skills.
- The scale's alignment with the tripartite model supports its use in diagnosing intellectual disability.
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