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Some supplementary methods for the analysis of the Delis-Kaplan executive function system

Crawford, John R.; Garthwaite, Paul H.; Sutherland, David and Borland, Nicola (2011). Some supplementary methods for the analysis of the Delis-Kaplan executive function system. Psychological Assessment, 23(4) pp. 888–898.

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Supplementary methods for the analysis of the Delis–Kaplan Executive Function System (Delis, Kaplan, & Kramer, 2001) are made available, including (a) quantifying the number of abnormally low achievement scores exhibited by an individual and accompanying this with an estimate of the percentage of the normative population expected to exhibit at least this number of low scores; (b) estimating the overall abnormality of an individual's achievement score profile with the Mahalanobis distance index; (c) calculating a composite executive function index score for an individual and providing accompanying confidence limits; and (d) providing the percentile ranks for an individual's achievement scores and executive index score (in the latter case, confidence limits on scores are also expressed as percentile ranks). With the exception of the Mahalanobis distance index, all the methods can be obtained with the equations and tables provided in this article. However, for the convenience of clinicians and to reduce the possibility of clerical error, the methods have also been implemented in a computer program. More important, the program allows the methods to be applied when only a subset of scores is available. The program can be downloaded (as a zip file) from this article's supplemental materials or from

Item Type: Journal Article
Copyright Holders: 2011 Psychological Assessment
ISSN: 1939-134X
Academic Unit/Department: Mathematics, Computing and Technology > Mathematics and Statistics
Mathematics, Computing and Technology
Item ID: 33026
Depositing User: Emma Howard
Date Deposited: 06 Mar 2012 09:44
Last Modified: 18 Jan 2016 13:58
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