“…ADHD is a major public health problem as it is associated with impaired child and family functioning and high societal costs and often leads to academic underachievement, behavior problems, parent–child conflicts, and peer relationship difficulties (Barkley, Anastopoulos, Guevremont, & Fletcher, 1992; Bernfort, Nordfeldt, & Persson, 2008; Efron et al, 2014; Loe & Feldman, 2007; Marton, Wiener, Rogers, & Moore, 2015). ADHD is considered a chronic disorder and, when it is not diagnosed and treated early on, it may result in various negative developmental outcomes (e.g., occupational problems, other psychiatric disorders, substance abuse, criminal activity) across the life span as well as an increased rate of mortality (Cherkasova, Sulla, Dalena, Pondé, & Hechtman, 2013; Dalsgaard, Østergaard, Leckman, Mortensen, & Pedersen, 2015; Knecht, De Alvaro, Martinez-Raga, & Balanza-Martinez, 2015; Kooij et al, 2012; Kuriyan et al, 2013). …”