“…Future studies should include additional variables in predictive models. These include personality variables such as agreeableness (Gleason, Jensen-Campbell, & Richardson, 2004), anxiety and anger (Wittmann, Arce, & Santisteban, 2008); family variables such as parental relationships (Underwood et al, 2008) and parent-child attachment (Michiels, Grietens, Onghena, & Kuppens, 2008); behaviors such as videogaming (Willoughby, Adachi, & Good, 2012); and genetics (Tackett, Waldman, & Lahey, 2009). …”