Korea Communications Commission & Korea internet and Security Agency, 2012 Survey on the Smartphone Usage [Internet], Available from: http://isis.kisa.or.kr/board/index.jsp?pageId=040000&bbsId=7&itemId=795&pageIndex=5 (accessed July, 6, 2015)
Ministry of Science, ICT and Future Planning & Korea Internet and Security Agency, 2014 Survey on the Internet Usage [Internet]. Available from: http://www.isis.kisa.or.kr/board/index.jsp?pageId=040100&bbsId=7&itemId=806&pageIndex=1 (accessed July, 6, 2015)
D. I. Kim, Y. J. Chung & Y. H. Lee, "Development of healthy smartphone use scale", The Korea Journal of Youth Counseling, 22(1), pp.393-421, 2014.
Ministry of Science, ICT and Future Planning & National Information Society Agency, "A survey on internet addiction", Seoul: Ministry of Science, ICT and Future Planning & National Information Society Agency, 2015. Report No.: NIA V-RER-14112.
J. Y. Jung & J. H. Ha, "The effects of general stress and emotional expression on upper grades of elementary school students' smart phone addiction", Journal of family and counseling, 3(1), pp.61-77, 2013.
B. N. Kim, E. J. Ko & H. I. Choi, "A study on factors affecting smart-phone addiction in university students: A focus on differences in classifying risk groups", Studies on Korean Youth, 24(3), pp.67-98, 2013.
J. S. Park, "The variables in influencing on smart phone addiction in adolescents and college students", Unpublished master's thesis, Dankook University, Gyeonggi. 2011.
I. Goldberg, Internet the addiction, Electronic message posted to research discussion list [Internet], Available from: http://www.webs.ulpgc.es/aeps/JR/Documentos/ciberadictos.doc (accessed July, 6, 2015)
American Psychiatric Association, "Diagnostic and statistical manual of mental disorders", 4th ed, Washington DC: American Psychiatric Association, 2000.
K. S. Young, "Internet addiction: the emergence of a new clinical disorder", CyberPsychology and Behavior, 1(3), pp.237-244, 1996.
H. J. Jang & K. M. Chae, "The psychological characteristics of adolescents with technological addiction", The Korean Journal of Health Psychology, 11(4), pp.839-852, 2006.
I. Marks, "Non-chemical (behavioural) addictions", British Journal of Addiction, 85, pp.1389-1394, 1990.
M. Griffiths, "Technological addictions", Clinical Psychology Forum, 76, pp.14-19, 1995.
M. Griffiths, "Internet addiction: fact or fiction?", The Psychologist, 12(5), pp.246-250, 1999.
American Psychiatric Association, "Diagnostic and statistical manual of mental disorders", 5th ed, Arlington VA: American Psychiatric Publishing, 2013.
National Information Society Agency, "Development of korean smartphone addiction proneness scale for youth and adults", Seoul: National Information Society Agency, 2011.
J. O. Choi, "Analysis of influence of smart phone addiction practice on ADHD symptoms of elementary school students", Crisis and Emergency Management: Theory and Praxis, 10(5), pp.159-178, 2014.
J. S. Hahn & S. Y. Kim, "A study on the difference in internet activities, self-control, self-regulated learning and academic achievement according to the level of internet addiction among middle school students", The Journal of Educational Information and Media, 12(2), pp.161-188, 2006.
S. H. Han & S. J. Wang, "Verification of the moderating effects of the variables related to adolescents' addiction to internet game and aggression", The Journal of Educational Research, 7(3), pp.51-72, 2009.
M. K. Kim, "The influence of adolescents' psychological variables and attachment with parents upon internet game addicts and cellular phone addicts", The Korean Journal of the Human Development, 19(4), pp.1-22, 2012.
S. J. Chang, S. W. Song & M. A. Cho, "The effects of perceived positive parenting attitude on mobile phone dependency: The mediating roles of self-esteem and attachment to peer", Korean journal of youth studies, 19(5), pp.161-187, 2012.
C. M. Lan & Y. H. Lee, "The predictors of internet addiction behaviours for taiwanese elementary school students", School Psychology International, 34(6), pp.648-657, 2013. DOI: http://dx.doi.org/10.1177/0143034313479690
M. Rosenberg, "Conceiving the self", New York: Basic Books, 1979.
B. G. Choi & G. Y. Jeon, "A study on the development of the self-esteem inventory(I)", Journal of the Korean Home Economics Association, 31(2), pp.41-54, 1993.
H. J. Eysenck & S. B. G. Eysenck, "Personality and individual difference: A natural science approach", New York: Plenum Press, 1985.
E. S. Barratt & R. C. White, "Impulsiveness and anxiety related to medical students performance and attitudes", Journal of Medical Education, 44, pp.604-607, 1969.
H. S. Lee, "The impulsivess scale", Seoul: Guidance, 1992.
A. C. Park & S. K. Lee, "A structural analysis of ecological variables affecting adolescent ego-identity development", Journal of Educational Psychology, 13(4), pp.113-142, 1999.
H. S. Choi, "A study on relationships among social environment variables, personal variables and career maturity attitude of early adolescents", Ph.D.dissertation, Konkuk University, Seoul, 2002.
D. L. DuBois, R. D. Felner, S. Brand, A. M. Adan & E. G. Evans, "A prospective study of life stress, social support, and adaptation in early adolescence", Child Development, 63, pp.542-557, 1992.
M. H. Han & A. J. Yoo, "Development of daily hassles scale for children in korea", Journal of the korean Home Economics Association, 33(4), pp.49-64, 1995.
Y. J. Jang, "A study on daily stress and protective factors of urban juveniles", Unpublished master's thesis, Chung-ang University, Seoul, 2004.
K. H. Cho, S. H. Kim & S. W. Han, "The relationship analysis between smartphone addiction and ecological factors of elementary students", Journal of The Korean Association of Information Education, 18(4), pp.491-498, 2014. DOI: http://dx.doi.org/10.14352/jkaie.2014.18.4.491
J. A. Roberts, C. Pullig & C. Manolis, "I need my smartphone: A hierarchical model of personality and cell-phone addiction", Personality and Individual Differences, 79, pp.13-19, 2015. DOI: http://dx.doi.org/10.1016/j.paid.2015.01.049