“…Previous research has emphasized the need to view attention-deficit/hyperactivity disorder (ADHD) as a heterogeneous disorder related to multiple neuropsychological deficits such as executive deficits, delay-related behaviors (i.e., the tendency to prefer smaller sooner rewards to longer delayed rewards), and emotion dysregulation (Castellanos, Sonuga-Barke, Milham, & Tannock, 2006;Coghill, Seth, & Matthews, 2014;Nigg, Willcutt, Doyle, & Sonuga-Barke, 2005;Sj€ owall, Roth, Lindqvist, & Thorell, 2013). This research has largely been based on studies of children and adolescents, although there are also studies showing links between ADHD symptoms in adulthood and executive deficits (Alderson, Kasper, Hudec, & Patros, 2013;Boonstra, Oosterlaan, Sergeant, & Buitelaar, 2005), delay-related behaviors (Mowinckel, Pedersen, Eilertsen, & Biele, 2015), and emotion dysregulation (Christiansen, Hirsch, Albrecht, & Chavanon, 2019;Shaw, Stringaris, Nigg, & Leibenluft, 2014). One limitation of previous studies on adult ADHD is that few have included multiple neuropsychological deficits within the same study, the result being that we know little about the extent to which these deficits overlap in relation to ADHD.…”