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Objective: To demonstrate that high IQ children and adolescents diagnosed with ADHD tend to suffer from executive function EF impairments that: a can be identified with a combination of standardized measures and normed self-report data; and b occur more frequently in this group than in the general population. Method: From charts of 117 children and adolescents aged 6 to 17 years with high IQ ≥ 120 who fully met DSM-IV diagnostic criteria for ADHD, data on 8 normed measures of executive function EF were extracted: IQ index scores for working memory and processing speed, a standardized measure of auditory verbal memory, and 5 clusters of the Brown ADD Scale, a normed, age-graded rating scale for ADHD-related executive function impairments in daily life. Significant impairment was computed for each individual relative to age-appropriate norms for each measure and comparisons were made to base-line rates in the general population. Results: Sixty-two percent of participants were significantly impaired on at least 5 of these 8 markers of EF. Chi-square comparisons of scores from these high IQ participants were significantly different p < 0.001 from standardization norms for each of the eight EF measures. Conclusions: High IQ children and adolescents with ADHD, despite their cognitive strengths, tend to suffer from significant impairments of executive functions that can be assessed with these measures; incidence of these impairments is significantly greater than in the general population. These results are fully consistent with data on high IQ adults diagnosed with ADHD.

KEYWORDS

ADHD; Executive Functions; High IQ; Working Memory; Processing Speed

Cite this paper

Brown, T. , Reichel, P. and Quinlan, D. 2011 Executive function impairments in high IQ children and adolescents with ADHD. Open Journal of Psychiatry, 1, 56-65. doi: 10.4236-ojpsych.2011.12009.





Autor: Thomas Edwards Brown, Philipp Christian Reichel, Donald Michael Quinlan

Fuente: http://www.scirp.org/



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