Neurobehavioral Impairment Scale of the A-ONE J: Rasch Analysis and Concurrent Validation

Background: The ADL-focused Occupation-based Neurobehavioral Evaluation (A-ONE) is used to evaluate both performance of ADL tasks and neurobehavioral impairments (NBIs) that interfere with ADL performance of clients with neurological disorders. Its Japanese translation is referred to as A-ONE J. This study examined the psychometric properties of the Neurobehavioral Impairment (NB) Scale of A-ONE J for persons with cerebral vascular accident (CVA). Methods: Rasch analysis was performed on NB scale data from 185 participants with CVA, as well as from right CVA (RCVA) and left CVA (LCVA) data separately. The values of the obtained Rasch indicators were compared with results from previous A-ONE studies.Results: Unidimensionality was obtained for 55 item CVA scale for the entire group as well as for 55 item RCVA scale and 53 item LCVA scale. Separation reliability for item and person calibrations was high for all three scales. Most comparisons of Rasch indicators concurrently met set criteria. Conclusion: The psychometric properties of the NB scale of A-ONE J were determined. The obtained unidimensionality of the NB scale items for Japanese people with CVA provides an opportunity for quantitative measurement of a wide range of NBIs interfering with their ADL performance.