Adults with ADHD often fail to reach the same occupational status as healthy controls (e.g., Barkley, Murphy, & Fischer, 2008). Functional impairments seem to be associated with clinical symptoms (e.g., Barkley et al., 2008), self-reported executive function (EF) deficits (Barkley & Fischer, 2011), and cognitive task performance (e.g., Miller, Nevado-Montenegro, & Hinshaw, 2012). Actual models of ADHD consider the influence of situational factors that influence motivation and activation on performance (e.g., Sergeant, 2005; Sonuga-Barke, 2005). Thus, it is essential to investigate such factors that may be facilitating for adults with ADHD to tailor and complement treatment options. Theoretical models and empirical investigations dealing with the influence of situational factors on cognitive performance in children with ADHD have mainly focused on the influence of physical activation, stimulation, and reward. However, less is known about the impact of these factors on adult ADHD.