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Factor Structure, Convergent Validity, and Discriminant Validity of the NIH Toolbox Cognitive Health Battery (NIHTB-CHB) in Adults

Published online by Cambridge University Press:  24 June 2014

Dan Mungas*
Affiliation:
Department of Neurology, University of California, Davis, California
Robert Heaton
Affiliation:
Department of Psychiatry, University of California, San Diego, California
David Tulsky
Affiliation:
Rusk Institute / Department of Rehabilitation Medicine, New York University, New York, New York
Philip David Zelazo
Affiliation:
Institute of Child Development, University of Minnesota, Minneapolis, Minnesota
Jerry Slotkin
Affiliation:
Department of Medical Social Sciences, Northwestern University, Chicago, Illinois
David Blitz
Affiliation:
Department of Medical Social Sciences, Northwestern University, Chicago, Illinois
Jin-Shei Lai
Affiliation:
Department of Medical Social Sciences, Northwestern University, Chicago, Illinois
Richard Gershon
Affiliation:
Department of Medical Social Sciences, Northwestern University, Chicago, Illinois
*
Correspondence and reprint requests to: Dan Mungas, Department of Neurology, 4860 Y Street, Suite 3700, Sacramento, CA 95817. E-mail: dmmungas@ucdavis.edu

Abstract

The objective of this study is to evaluate the construct validity of the NIH Neurobehavioral Toolbox Cognitive Health Battery (NIHTB-CHB) in adults. Confirmatory factor analysis was used to evaluate the dimensional structure underlying the NIHTB-CHB and Gold Standard tests chosen to serve as concurrent validity criteria for the NIHTB-CHB. These results were used to evaluate the convergent and discriminant validity of the NIHTB-CHB in adults ranging from 20 to 85 years of age. Five dimensions were found to explain the correlations among NIHTB-CHB and Gold Standard tests: Vocabulary, Reading, Episodic Memory, Working Memory and Executive Function/Processing Speed. NIHTB-CHB measures and their Gold Standard analogues defined factors in a pattern that broadly supported the convergent and discriminant validity of the NIHTB-CHB tests. This 5-factor structure was found to be invariant across 20–60 year old (N=159) and 65–85 year old (N=109) age groups that were included in the current validity study. Second order Crystallized Abilities (Vocabulary and Reading) and Fluid Abilities (Episodic Memory, Working Memory, Executive/Speed) factors parsimoniously explained correlations among the five first order factors. These results suggest that the NIHTB-CHB will provide both fine-grained and broad characterization of cognition across the adult age span. (JINS, 2014, 20, 1–9)

Type
Special Series
Copyright
Copyright © The International Neuropsychological Society 2014 

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