Influence of Motor Function on a Continuous Performance Test with Suspected Attention Deficit/Hyperactivity Disorder

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Title: Influence of Motor Function on a Continuous Performance Test with Suspected Attention Deficit/Hyperactivity Disorder
Author: Kandalaft, Michelle Rima
Abstract: Clinicians and researchers have expressed concern about the potential confound of psychomotor skills on Continuous Performance Test variables commonly used in AD /HD assessments . Several studies have addressed this relationship but with limitations . Evidence for this potential influence as well as evidence of slow processing and motor speed in samples of children with known attention and motor deficits are demonstrated in the research . Due to the increasing rate of referrals for AD /HD diagnoses , the increasing use of CPTs , and the lack of knowledge about the influence of psychomotor functioning on these measures , an examination of this relationship is considered necessary to address the use of CPTs in AD /HD evaluations . The sample consisted of 99 children with suspected attention deficits between the ages of 6 and 16 years . Psychomotor functioning was assessed by the WISC -IV Processing Speed Index and the Beery VMI . Attention was measured with the WISC -IV Working Memory Index and subscales of the parent -rated BASC -2 . Results of this study revealed that psychomotor and attention measures on the WISC -IV related to and accounted for variance in T .O .V .A . variables to a moderate degree . Stepwise regressions indicated the WISC -IV Processing Speed Index predicted both Response Time and Response Time Variability . In contrast , another measure of psychomotor skills , the Beery VMI , did not predict T .O .V .A . variables . Interestingly , the Working Memory Index accounted for variance in Commission Errors , a measure of impulsivity , but not Omission Errors , a measure of sustained attention . Also , unexpected , differences among primary T .O .V .A . variables were not found across sub -samples when grouped by BASC -2 scores . These significant but modest results suggest that when evaluating a child for AD /HD , clinical consideration of the influence of psychomotor skills , as measured by the WISC -IV , on T .O .V .A . Response Time and Response Time Variability is warranted . Furthermore , the use of both the WISC -IV Working Memory Index and the T .O .V .A . is useful for assessing varying components of attention , such as focused and sustained attention .
URI: http : / /hdl .handle .net /2152 .5 /767
Date: 2009-06-17

Citation

Influence of Motor Function on a Continuous Performance Test with Suspected Attention Deficit/Hyperactivity Disorder. Graduate School of Biomedical Sciences. Available electronically from http : / /hdl .handle .net /2152 .5 /767 .

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