“…Many studies have substantial methodological limitations including lacking appropriate control groups, small sample sizes, positively biased selection of highly intelligent participants, and/or no consideration of age effects. With these caveats in mind, high intelligence seems to be associated with at least average but mostly superior processing speed (Duan et al, 2013;Hoard et al, 2008;Swanson, 2006), visuoconstructive skills and visual memory (Arffa, 2007), sustained attention (Shi et al, 2013), working memory capacity (Hoard et al, 2008;Swanson, 2006), response inhibition (Liu et al, 2011a,b;Duan et al, 2009), interference control (Arffa, 2007;Liu et al, 2011c;Johnson et al, 2003), set shifting (Arffa, 2007;Duan and Shi, 2014;Johnson et al, 2003) and reversal learning (Arffa et al, 1998;Arffa, 2007;Tanabe et al, 2014). Given this inverse relationship between the cognitive correlates of ADHD and high intelligence, the gap between cognitive subcomponents/subskills and general intelligence appears largest in highly intelligent individuals with ADHD.…”