“…Regarding social health factors, it was found that PGB was mostly associated with problems in interfamily relationships (Jeong and Kim, 2011), familial harmony (Rikkers et al, 2016; Wang et al, 2014), social integration at school (Rehbein and Baier, 2013), parent–child attachment and parental rearing attitudes (Kim and Kim, 2015) and social self-efficacy (Rehbein et al, 2010; Walther et al, 2012). Additionally, shyness (Peng and Liu, 2010), social phobia (Lehenbauer-Baum et al, 2015), decreased openness (Wang et al, 2015) and interpersonal difficulties (Baer et al, 2012; Festl et al, 2013; Kim et al, 2008; Müller et al, 2015; Rikkers et al, 2016; Strittmatter et al, 2015) were positively associated with PGB. Furthermore, social self-efficacy in the virtual world and preferences for online interactions correlated positively with PGB (Collins and Freeman, 2013; Jeong and Kim, 2011; Porter et al, 2010).…”