Abstract
Children and adolescents with Tourette Syndrome (TS) do not have a characteristic neuropsychological profile. Performance on complex cognitive tasks, particularly those associated with executive functioning (EF), has been variable and sometimes contradictory. The high rate of comorbidity of TS with disorders, especially Attention Deficit Hyperactivity Disorder (ADHD), may account for such variability. A group of 57 individuals with TS, aged 8 – 16, was examined on a component of executive functioning in relation to comorbid symptomatology of ADHD. Each participant was evaluated using two EF measures, the Wisconsin Card Sorting Test (WCST) and the California Card Sorting Test (CCST). Using factor analytic procedures for purposes of data reduction, WCST and CCST measures loaded on different factors. Individuals with TS who had a high rate of ADHD symptomatology did not differ from those with a lower rate of ADHD symptomatology on any measure of card sorting performance.
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