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An item response theory analysis of the Rey Osterrieth Complex Figure Task.

The Rey-Osterrieth Complex Figure Task (ROCFT) has been a standard in neuropsychological assessment for six decades. Many researchers have contributed administration procedures, additional scoring systems and normative data to improve its utility. Despite the abundance of research, the original 36-point scoring system still reigns among clinicians despite documented problems with ceiling and floor effects and poor discrimination between levels of impairment. This study is an attempt to provide a new method based upon item response theory that will allow clinicians to better describe the impairment levels of their patients. Through estimation of item characteristic curves, underlying traits can be estimated while taking into account varying levels of difficulty and discrimination within the set of individual items. The ultimate goal of the current research is identification of a subset of ROCFT items that can be examined in addition to total scores to provide an extra level of information for clinicians, particularly when they are faced with a need to discriminate severely and mildly impaired patients.

Identiferoai:union.ndltd.org:unt.edu/info:ark/67531/metadc9783
Date12 1900
CreatorsEveritt, Alaina
ContributorsGuarnaccia, Charles A., Houtz, Andrew, Eve, Susan Brown, Kelly, Kimberly S.
PublisherUniversity of North Texas
Source SetsUniversity of North Texas
LanguageEnglish
Detected LanguageEnglish
TypeThesis or Dissertation
FormatText
RightsPublic, Copyright, Everitt, Alaina, Copyright is held by the author, unless otherwise noted. All rights reserved.

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