“…Relatively underdeveloped areas of study within well-being need to be expanded. These areas include: research on the beneficial effects of play and curiosity (Kashdan, 2009) and of connecting with the natural environment (Capaldi, Dopko, & Zelenski, 2014; Howell & Passmore, 2013); and the study of wisdom (Staudinger & Glück, 2011), the concept of “true self” (Schlegel, Hicks, Arndt, & King, 2009), and other-oriented hope (Howell & Larsen, 2015). The study of happiness and well-being in children and adolescents is also an important area within positive psychology to which more attention is required (Holder, 2012; Proctor & Linley, 2013), as is the application of positive psychology to substance use, addiction, and recovery research (Krentzman, 2013).…”