1. National Youth Policy Institute.Korea child youth panel survey IX. Panel Survey Report. Report No: 2018‐R13. 2019. Available at:https://www.nypi.re.kr/brdrr/boardrrView.do?menu_nix=4o9771b7&brd_id=BDIDX_PJk7xvf7L096m1g7Phd3YC&cont_idx=648&seltab_idx=0&edomweivgp=R. Accessed April 26 2020.
2. The mediating effect of self‐efficacy on parental attachment, peer attachment, and smart phone addiction in middle school students;Jung GI;J Rehabil Psychol,2016
3. Korean students' smartphone usage and happiness: a sex approach to the moderating effect of parent relationship;Kim KM;Korean J Inform Soc,2014
4. Are digital natives a world phenomenon?;Prensky M;Comput Educ,2010