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Rating scale analysis of the Neurobehavioral Cognitive Status Examination
N A Doninger1, R K Bode, A W Heinemann
1Rehabilitation Institute of Chicago, Northwestern University Medical School, Chicago, Illinois 60611, USA.
Objective:
Evaluate the measurement properties of the Neurobehavioral Cognitive Status Examination (NCSE) using rating scale analysis.
Design:
Calibration of item responses collected as part of a study examining characteristics of case-management programs and treatment outcomes.
Setting:
Three outpatient rehabilitation facilities.
Participants:
Convenience sample of 186 community-dwelling adults with TBI.
Results:
Several rating scale analyses were performed to construct a unidimensional measure. Deletion of easy and misfitting items created a better targeted test (generated more spread among individuals) without increased error.
Conclusions:
If used with a community-based sample, three strata can be differentiated despite a skewed distribution. Recommended applications are with samples with considerably more cognitive impairment.