social networking Internet Gaming Disorder 2 Internet addiction 2 Internet gaming disorder 2 addiction 2 adolescence 2 adolescents 2 anxiety 2 comorbidity 2 depression 2 gaming disorder 2 impulsivity 2 internet addiction 2 internet gaming disorder 2 mixed methods research 2 personality 2 personality traits 2 problematic Internet use 2 problematic mobile phone use 2 problematic smartphone use 2 smartphone addiction 2 smartphone use 2 social media 2 stress 2 university students 2 video games 2 21st century 1 BMI percentile 1 Behavioral Inhibition System/Behavioral Activation System (BIS/BAS) 1 Brief Self-Control Scale (BSCS) 1