Measurement properties of the neurobehavioral cognitive status examination (Cognistat) in traumatic brain injury rehabilitation

Nicholas A. Doninger*, Dawn M. Ehde, Rita K. Bode, Kristin Knight, Charles H. Bombardier, Allen W. Heinemann

*Corresponding author for this work

Research output: Contribution to journalArticle

10 Scopus citations

Abstract

Objective: Evaluate measurement properties of the Neurobehavioral Cognitive Status Examination (Cognistat) using Rasch analysis. Design: Calibration of item responses from 120 individuals admitted to a rehabilitation medicine service for traumatic brain injury (TBI) and 296 community-dwelling adults with TBI. Results: Three strata of performance were differentiated despite a skewed distribution toward high performance among the community sample. Elimination of easier items created a better targeted instrument (i.e., generated more spread among individuals) without a significant increase in error. Memory and verbal reasoning were the most difficult domains for each sample; however, analyses indicated significant measurement error. Conclusions: As a screening instrument, the Cognistat reliably classifies multiple levels of cognitive status in both acute and postacute TBI settings; however, this measure is unsuitable for generating a profile of neurocognitive strengths and weaknesses.

Original languageEnglish (US)
Pages (from-to)281-288
Number of pages8
JournalRehabilitation Psychology
Volume51
Issue number4
DOIs
StatePublished - Nov 1 2006

Keywords

  • Brain injury
  • Neuropsychological tests
  • Psychometrics
  • Rating scale analysis
  • Rehabilitation

ASJC Scopus subject areas

  • Physical Therapy, Sports Therapy and Rehabilitation
  • Rehabilitation
  • Clinical Psychology
  • Psychiatry and Mental health

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