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Item-domain relationships in the Adaptive Behavior Scale (ABS)
Applied Research in Mental Retardation
|January 1, 1982
Summary
The Adaptive Behavior Scale (ABS) shows good internal consistency reliability for most domains, with over 60% of items meeting satisfactory criteria. These findings support its use in assessing institutionalized individuals with intellectual disabilities.
Area of Science:
- Psychometrics
- Developmental Psychology
- Behavioral Assessment
Background:
- The Adaptive Behavior Scale (ABS) is a key tool for assessing individuals with intellectual disabilities.
- Ensuring the reliability of assessment tools is crucial for accurate diagnosis and intervention planning.
Purpose of the Study:
- To evaluate the internal consistency reliability of the Adaptive Behavior Scale (ABS) domains.
- To assess the item-level performance of the ABS using item analysis.
Main Methods:
- Internal consistency reliability was examined using Cronbach's coefficient alpha.
- Item analysis involved correlating individual ABS items with domain scores.
- Data were collected from client care-staff ratings of 265 institutionalized individuals.
Main Results:
- Nine out of 10 Part I domains and 6 out of 14 Part II domains demonstrated excellent internal consistency (coefficient alpha ≥ .80).
- Item analysis indicated that 62% of Part I items and 61% of Part II items met satisfactory criteria.
Conclusions:
- The ABS exhibits strong reliability for a majority of its domains, particularly in Part I.
- The findings suggest the ABS is a reliable instrument for assessing adaptive behavior in institutionalized populations with intellectual disabilities.