Digit span subtest norms by age12/20/2023 Much of the research to date regarding performance validity, including use of RDS, has been done with adults with an overrepresentation of traumatic brain injury. Reliable Digit Span (RDS Greiffenstein, Baker, & Gola, 1994) is a well-established embedded measure of performance validity ( Boone, 2007 Schroeder, Twumasi-Ankrah, Baade, & Marshall, 2012) that can be derived from standard DS administration. The digit span (DS) subtest from the Wechsler Adult Intelligence Scale-IV (WAIS-IV Wechsler, 2008) is one of the most frequently used measures of attention and working memory ( Hales, Yudofsky, & Roberts, 2014 Rabin, Barr, & Burton, 2005). These tests are designed to ensure that the results obtained from a neuropsychological evaluation are in fact a valid representation of an individual's cognitive abilities ( Boone, 2007 Larrabee, 2012). Given findings indicating effort accounts for a large percentage of variance in neuropsychological test performance ( Fox, 2011 Green, Rohling, Lees-Haley, & Allen, 2001 Meyers, Volbrecht, Axelrod, & Reinsch-Boothby, 2011), objective measures of effort have been developed to try to identify inconsistent performance. Dementia, Malingering/symptom validity testing, Assessment, Reliable Digit SpanĮvaluating the validity of neuropsychological profiles is an essential part of clinical care in both litigating and non-litigating contexts ( Bush et al., 2005 Heilbronner, Sweet, Morgan, Larrabee, & Millis, 2009 McCrea et al., 2008), and recent research has highlighted the importance of assessing performance validity in research settings as well ( An, Zakzanis, & Joordens, 2012 DeRight & Jorgensen, 2015 Silk-Eglit et al., 2014).
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