• The Journal of the Korea Contents Association
• /
• v.20 no.5
• /
• pp.193-203
• /
• 2020

The purpose of this study is to test the effect of smart-phone addiction on school adjustment. In detail, this study focus on mediating effect of psychological distress. For this purpose, Data Collected on 375 students at 4 high schools in the capital area were used in the analysis. Correlation analysis was conducted to find out the relationship between smart-phone addiction, school adjustment, psychological distress. To find out if smart-phone addiction and school adjustment are mediated by the relationship between psychological distress, the model was tested using a structural equation. The results of the study were as follows: The smart-phone addiction is found to have an adverse effect on high school students' school adaptation and a positive effect on psychological distress. And the results of the verification of the structural model showed a significant mediating effect of psychological distress in the relationship between smart-phone addiction and school adjustment. Based on the results of this study, significance and implications were presented.

• The Journal of the Korea Contents Association
• /
• v.20 no.2
• /
• pp.478-486
• /
• 2020

The purpose of this study was to find out the actual status of smartphone students' dependence on college students, and to identify the correlation between depression, self-efficacy and smartphone overdependence, and the role of self-efficacy in the relationship between depression and smartphone overdependencee. The main results of the survey and analysis of 1,177 four-year college students located in Gyeonggi area are as follows. First, the percentage of college students' smartphone overdependence was very high at 34.1%. Second, there was a significant difference in prevalence of depression between the smartphone overdependence group(18.7%) and the general user group(11%). Third, self-efficacy showed a negative correlation with smartphone overdependence. The smartphone overdependence group showed significantly lower score in self-efficacy and self-regulation efficacy, confidence, and task difficulty preference than the general user group. Fourth, self-efficacy worked as a mediating variable in the relationship between depression and smartphone overdependence. In other words, the effect of depression on smartphone overdependence tended to decrease as self-efficacy rose in the relationship. Finally, we discussed the development of programs to support career and psychological counseling of university students.

• Journal of Digital Convergence
• /
• v.10 no.9
• /
• pp.175-184
• /
• 2012

The aim of this study is to inquire into the influential relationship between perceived characteristics and psychological attitude toward smart phone in relation with the smart phone. This study conducted a questionnaire survey targeting domestic college students who are using the smart phone in an effort for an empirical test of the research model. The theoretical implications of this study laid foundation for doing research on the behavior of perceived characteristics and psychological attitude toward technology, and supplied a clue to diverse, in-depth research works on the further smart phone. The study-suggested practical implications are as follows: First, it is required that the usefulness and easy of use of the smart phone should be reinforced in order to form a positive attitude toward the smart phone. Second, the sense of dependence on the smart phone has an influence on user satisfaction.

• Journal of the Korea Society of Computer and Information
• /
• v.24 no.10
• /
• pp.257-265
• /
• 2019

The purpose of the present study was to examine the causal relationship between aggression and mobile phone dependency among high school students and to test the mediating effect of self-esteem, and to draw out implications in order to encourage proper use of mobile phone. In this paper, we proposed a research model between aggression, self-esteem and mobile phone dependency. The present study analyzed the fourth, fifth, and sixth wave data from KCYPS 2010, using the structural equation modeling. The primary results were as follows. First, the effect of high school students' aggression on mobile phone dependency was not significant. Second, high school students' aggression had a significantly negative effect on self-esteem. Third, high school students' self-esteem had a significantly positive effect on mobile phone dependency. Fourth, high school students' self-esteem could be a significant mediator between aggression and mobile phone dependency. In conclusion, theoretical and practical suggestions were discussed in order to solve the problem of adolescents' mobile phone dependency.

• The Journal of the Korea Contents Association
• /
• v.22 no.5
• /
• pp.734-745
• /
• 2022

The purpose of this study is to examine the relationship of parental self-esteem with adolescents' smartphone over-dependence and to investigate whether parental attitudes mediate between them. The SEM was utilized by extracting data from 2,590 pairs of middle school students and their parents in the 1st year from the KCYPS 2018. First, parental self-esteem had a significant correlation with adolescent's smartphone over-dependence. Second, parental attitude mediates the effect of parental self-esteem on adolescent's smartphone overdependence. Third, among six sub-factors of parental attitude, only inconsistency was significant. In conclusion, to prevent teens' smartphone overdependence, parental factors such as parents' self-esteem enhancing and consistent parental attitude to their children is important. Based on these results, practical measures for preventing smartphone over-dependence of adolescents were discussed.

• Journal of Digital Convergence
• /
• v.14 no.12
• /
• pp.293-302
• /
• 2016

The study explores how academic strain, unhappiness, and mobile phone dependency among adolescents have changed over time. And we conducted the longitudinal and complex analysis on the influence of academic strain on unhappiness and mobile phone dependency in order to search the ways to prevent a vicious circle among them. We used general strain theory as a conceptual research frame and analysed the data of 1,589 respondents of the 2nd~4th Korean Children and Youth Panel with latent growth modeling. It was found that the levels of academic strain, unhappiness, and mobile phone dependency among adolescents were linearly increased across time. Academic strain initial status positively affected unhappiness initial status and both the initial status and change rate of mobile phone dependency. The change rate of unhappiness positively affected that of mobile phone dependency. Academic strain change rate positively influenced that of mobile phone dependency mediated by unhappiness change rate. We provided useful implications to academic activities, negative emotions, and mobile phone dependency for adolescents and suggested future studies about reasons of the changes of those variables.

• Korean Journal of School Psychology
• /
• v.18 no.2
• /
• pp.269-290
• /
• 2021

This study was conducted to examine the moderated mediation effect of self-esteem through internet overdependence on the effect of academic stress on depression and anxiety. Surveys were conducted as part of the 13th wave of the Korea Welfare Panel Study. The survey included academic stress, internet overdependence, depression and anxiety, and self-esteem scales. A total of 383 middle school students completed surveys. Data was analyzed using SPSS 21.0 and SPSS PROCESS Macro. There were three major results. First, internet overdependence partially mediation the effect of academic stress on depression and anxiety. Second, self-esteem moderated the relationship between internet overdependence and depression and anxiety. Third, self-esteem also moderated the mediating effect of academic stress on depression and anxiety through internet overdependence. These results indicate that self-esteem is a protective factor against the negative effects of internet overdependence on mental health and of academic stress on depression and anxiety in middle school students. This paper discusses the implications of these results, this study's limitations, and suggestions for future studies.

• Journal of Digital Convergence
• /
• v.19 no.12
• /
• pp.577-586
• /
• 2021

This study is objected to identify the influencing factors of adolescents' smartphone dependency and to determine the degree of influence on smartphone dependency through direct and indirect channels acting between factors. The data of the 2th Korean Child-Youth Panel Survey(KCYPS 2018) was analyzed using the SPSS 26.0 and 26.0 AMOS program. Six paths proved to statistically significant. Self-esteem and depression were the influencing factors of adolescents' smartphone dependency. Social withdrawal and the school environment influenced smartphone dependency through self-esteem and depression as mediators. Self-esteem and depression acted as mediating factors. Adolescents' smartphone dependency was influenced not only by personal factors but also by external factors such as the school environment. The results of this study will be presented as evidence for developing programs that can prevent adolescents from smartphone dependency.

• Journal of Industrial Convergence
• /
• v.21 no.7
• /
• pp.65-73
• /
• 2023

This study identified the relationship between adolescents' academic helplessness and smartphone dependence and verified the parallel mediating effect of self-esteem and friendships. To this end, the fourth data of the Korean Children and Youth Panel Survey 2018 (KCYPS) conducted by the Korea Youth Policy Institute were used, and 2,244 were used for analysis after removing 346 adolescents who responded to the survey. For data analysis, the statistical package programs SPSS WIN 25.0 and Hayes (2013)'s PROCESS Macro V 3.5 were used, and the following results were derived. First, adolescents' academic helplessness had a positive (+)(+) effect on their dependence on smartphones. Second, self-esteem was found to mediate the relationship between adolescents' academic helplessness and smartphone dependence. Third, it was found that friend relationships mediate the relationship between adolescents' academic helplessness and smartphone dependence. Based on these results, practical and policy suggestions to reduce adolescents' dependence on smartphones and follow-up studies to overcome the limitations of research were proposed.

• Journal of the Korean Vacuum Society
• /
• v.2 no.1
• /
• pp.9-16
• /
• 1993

부분압 분석 장비의 감도 측정 시스템을 설계 제작하였다. 이 시스템을 이용하여 부분압측정기기로 많이 쓰이는 Quadrupole Mass Spectrometer의 N2, O2, Ar, CO, H2에 대한 감도를 10-4∼10-8torr 영역에서 측정하여 감도의 압력 의존성을 보고 검출 방식, Emission current, Secondary Electron Multiplier 전압 등이 감도에 미치는 영향도 측정하였다. 실험 결과 기체 종류에 따라서는 물론 사용조건에 따라서도 감도의 절대값 변화 및 압력 의존성 변화가 아주 심한 것을 알 수 있었다. 따라서 Quadrupole Mass Spectrometer를 정량적인 측정에 이용하기 위해서는 이에 대한 감도 측정 및 특정조사가 반드시 선행되어야 한다.