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Criterion Validity of the Delis-Kaplan Executive Function System (D-KEFS) Fluency Subtests After Traumatic Brain Injury

Published online by Cambridge University Press:  02 December 2010

Carrie-Ann H. Strong ,
David Tiesma  and
Jacobus Donders
Carrie-Ann H. Strong
Affiliation:
Psychology Service, Mary Free Bed Rehabilitation Hospital, Grand Rapids, Michigan
David Tiesma
Affiliation:
Department of Psychology, Calvin College, Grand Rapids, Michigan
Jacobus Donders*
Affiliation:
Psychology Service, Mary Free Bed Rehabilitation Hospital, Grand Rapids, Michigan
*
Correspondence and reprint requests to: Jacobus Donders, Psychology Service, Mary Free Bed Rehabilitation Hospital, 235 Wealthy S. E., Grand Rapids, MI, 49503. E-mail: jacobus.donders@maryfreebed.com
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Abstract

The performance of 65 patients with complicated mild–severe traumatic brain injury was evaluated on the Verbal and Design Fluency subtests of the Delis-Kaplan Executive Function System (D-KEFS), and compared with that of 65 demographically matched healthy controls. There were statistically significant group differences on Letter Fluency and Category Switching but not on any of the Design Fluency tasks. Combined, these two Verbal Fluency subtests had a classification accuracy of 65.39%, associated with a likelihood ratio of 1.87. The impact of length of coma on Letter Fluency performance but not Category Switching was mediated at least in part by processing speed. The findings suggest modest criterion validity of some of the D–KEFS Verbal Fluency subtests in the assessment of patients with complicated mild–severe traumatic brain injury. (JINS, 2011, 17, 230–237)

Keywords

Neuropsychological assessmentExecutive functioningVerbal fluencyDesign fluencyClassification accuracyClinical utility
Type
Research Articles
Information
Journal of the International Neuropsychological Society , Volume 17 , Issue 2 , 28 February 2011 , pp. 230 - 237
Copyright
Copyright © The International Neuropsychological Society 2010

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