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Faraone, S., Biederman, J., Spencer, T., Mick, E., Murray, K. Petty, C., et al. (2006) Diagnosing adult attention deficit hyperactivity disorder: Are late onset and subthreshold diagnoses valid? American Journal of Psychiatry, 163, 1720-1729. doi:10.1176/appi.ajp.163.10.1720

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• TITLE: Executive function impairments in high IQ children and adolescents with ADHD

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

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

  JOURNAL NAME: Open Journal of Psychiatry, Vol.1 No.2, July 12, 2011

  ABSTRACT: 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