Iq Number Test Download Citation Copy

In addition, several of the studies either included patients for whom an incentive to feign was present (e.g., disability evaluations, evaluat ions in legal arenas, etc.), or did not identi fy whether such external incentives were ruled out.

Iq Number Test Download Citation Copy

Download full-text PDF Read full-text Download full-text PDF Read full-text Download citation Copy link Link copied Read full-text Download citation Copy link Link copied Citations (88) References (30) Figures (3) Abstract and Figures The relationship between IQ and nine effort indicators was examined in a sample of 189 neuropsychology clinic outpatients who were not in litigation or attempting to obtain disability.

Participants with the lowest IQ (50-59) failed approximately 60 of the effort tests, while patients with an IQ of 60 to 69 failed 44 of effort indicators, and individuals with borderline IQ (70 to 79) exhibited a 17 failure rate.

All patients with IQ Number of effort indices failed by IQ band: Mean, range, and mean percent Means, standard deviations, and specificities of effort indicators by IQ band Adjusted effort cutoffs and corresponding specificities for low IQ groups Figures - uploaded by Andy C Dean Author content All figure content in this area was uploaded by Andy C Dean Content may be subject to copyright.

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Particip ants with the lowest IQ (5059) failed approximately 60 of the effort tests, while patients with an IQ of 60 to 69 failed 44 of effort indicators, and individuals with borderline IQ (70 to 79) exhibited a 17 failure rate.

Keywords: Effort; IQ; Malingering; Mental retardation; Specificity; Validity.

INTRODUCTION Incentives abound for the prod uction of suboptimal effort during neuropsyc ho- logi cal asse ssme nt.

Oste nsib le impa irme nt can lead to the al loca ti on of disa b ilit y monies or workers compensation benefits, and the landmark Atkins vs.

Virginia (2002) Supreme Court decision prohibits individuals with mental retardati on from receiving the death penalty during crim inal sentencing.

This will likely increase the number of requests for forensic neuropsychological assessment in these cases, which will require inclusion of tests of effort motivation to ensure that the results are accu- rate.

However, are common ly used effort tests appropriate for use with individu als in the borderline or extre mely low ranges of intellectua l functioning How common is effort test failure in low IQ groups Given the stakes involved in some forensic cases (e.g., death penalty sentenc ing), examination of the relationship between intellectual abilities and effort test performan ce becomes a critical step in assuring that effort test s are valid across populations.

Dean, Harbor-UCLA Medical Center, Box 495, Torrance, CA 90509, USA.

E-mail: andydean1msn.com Accepted for publication May 7, 2007.

First published online: July 24, 2007.

Psychology Press, an imprint of the Taylor Francis group, an Informa business The Clinical Neuropsychologist, 22: 705722, 2008 ISSN: 1385-4046 print 1744-4144 online DOI: 10.108013854040701440493.

Table 1 summa rizes the available resear ch relating IQ to a variety of effort measures, with particular emphasi s on samples subsamples in the men tally retarded, or extremely low (i.e., Full Scale IQ 70), range of func- tioning.

Specificity estimat es (i.e., the percentage of credibl e individuals appropri- ately passing the effort test) are reproduced when available or if they could be calculated from article data.

Correlations between IQ and effort test performance are also provided where available.

Samples in which pa rticipants may have had incentive to feign cognitive impairment are identifi ed.

Initial examination of the table reveals that only a small subset of effort measures have been evaluat ed in more than one study in low IQ populations, and many studi es had smal l sample sizes.