• Journal of the Korea Academia-Industrial cooperation Society
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• v.21 no.6
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• pp.309-316
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• 2020

The aim of this study was to identify the relationship between smartphone usage time and oral health among Korean adolescents using data from the 13th (2017) Korea Youth Health Behavior Survey, which included 62,276 subjects. The daily smartphone usage time was categorized as not used, less than 2 hours, more than 2 hours, less than 4 hours, and more than 4 hours. Our results reveal that 60.1% of participants and 61.7% of smartphone users experienced oral disease symptoms annually, 27.4% of total adolescents used smartphone more than 4 hours daily during weekdays, and 53.8% more than 4 hours daily on weekends. The results from multivariate logistic regression analysis adjusting general characteristics show that the adjusted odds ratio (aOR) for risk of oral disease experience was 1.78 (95% confidence interval, CI 1.67-1.91) times higher in the group that used smartphones more than 4 hours a day on weekdays and 1.81 (95% CI 1.70-1.93) times higher in the group that used smartphones more than 4 hours a day on weekends compared to the group that did not use smartphones. The results indicate that smartphone overuse among Korean adolescents has a harmful effect on oral health. Education programs for reducing excessive use of smartphones among adolescents will help promote oral health.

• Journal of Labour Economics
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• v.37 no.2
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• pp.49-78
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• 2014

This paper examines the impacts of introducing Five-day school week in South Korean on adolescents' time use. Exploiting the exogenous variation in the adolescents' time at school on Saturday, I estimate the causal effect of change of adolescents' discretion time on their time use. The main findings are as follows. The introduction of the five day school week increased the adolescents' discretion time and their time spent on sleeping, passive leisure(mainly watching television). A one-minute decrease in the adolescents' time at school increase their sleeping time by 0.46 minute and passive leisure time by 0.26 minute.

• The Journal of Korean Academy of Sensory Integration
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• v.22 no.1
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• pp.43-53
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• 2024

Objective : The aim of this study was to investigate the differences in academic and mental health status (generalized anxiety, depression, stress, loneliness, and suicidal thoughts) between adolescents exhibiting normal and excessive smartphone use patterns. Methods : The smartphone use times and academic and mental health status of 51,850 adolescents were analyzed using raw data from the 2022 Korea Youth Risk Behavior Web-Based Survey. Descriptive statistics of complex sample analysis, frequency analysis and linear regression analysis were performed. Results : The mean smartphone use time of middle and high school students was 6 hours 43 minutes on weekends and 4 hours 39 minutes on weekdays. There were significant differences in smartphone use time according to gender and grade. As a result of comparing differences in academic status between adolescents with excessive smartphone use times and those with normal use times. In terms of mental health status, adolescents with excessive use times had higher generalized anxiety, depression, stress, loneliness, and suicidal thought scores than adolescents with normal use times. Conclusion : This study can be used as a basic reference for research on smartphone overuse.

• Journal of the Korean Data Analysis Society
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• v.20 no.6
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• pp.3201-3209
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• 2018

The purpose of this study was to explore the factors predicting increased usage hours of smartphone among adolescents. Secondary data was analyzed to be collected from a nationally representative sample of 2017 Korean adolescents. This study sample included 54,601 students in middle or high schools of Korea. The collected data were analyzed SPSS version 23.0 program for frequency, percentage, mean, standard deviation, t-test, ANOVA, Pearson's correlation coefficient and binary logistic regression analysis. In the results, the mean usage hour of smartphone among the adolescents was 28.42 (SD 23.30) per week. Analyses of the differences in usage hours of smartphone according to research variables were found that the groups of lower level of study (F=1361.067, p<.001) and sociality content type (F=761.549, p<.001) spent more time, as compared to the other groups. The logistic analysis showed the predictive factors for increased hour of using smartphone were smartphone usage for sociality (OR: 2.44, 95% CI: 2.26-2.64) and peer group counselor (OR: 1.49, 95% CI: 1.49). Conclusionally, the findings of this study suggests that it needs to understand cause or purpose of smartphone using of adolescent and to cope and educate on the cause.

• The Journal of Korean Academy of Sensory Integration
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• v.18 no.1
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• pp.44-55
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• 2020

Objective : This study used the data of the National Statistical Office to analyze the time use of disabled youth and their self-satisfaction with it by their type of occupation. Methods : Using raw data extracted from Statistics Korea, 84 disabled youth from 10 to 24 years old were re-classified into six occupational areas based on Occupational Therapy Practice Framework (OTPF)-3. The occupational types were classified according to the time use by individuals based on data from Statistics Korea. Finally, according to the type of occupation, self-satisfaction with the use of time was identified. Results : The total amount of time spent by disabled youths was the largest in the rest and sleep categories, followed by daily living, education, leisure, social participation, and play. The analysis of occupational types showed that the groups were turned around (10.71% of participants), high activity group (50.00%), low activity (28.57%), and balanced (10.71%). There were significant differences between types in the first five of the aforementioned categories. There was no significant difference in the lack of time use, but there was a significant difference among their satisfaction with their use of time. The balanced type (21.53%) reported the most satisfaction. inadequacy Conclusion : The purpose of the project was to provide the raw data of intervention activities that can improve the quality of life and health of disabled youth. By analyzing their time use and occupations, deficiencies in time management and their satisfaction with their use of time can be noted.

• Journal of Digital Convergence
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• v.13 no.9
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• pp.387-395
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• 2015

The aim of this study was to investigate effects of socio-demographic, household, social support, health-related factors on adolescent internet use time. Multiple regression analysis was conducted to examine factors affecting adolescent internet using time, and this study used the 2014 10th Korean Youth Health Risk Behavior On-line Survey data by Centers for Disease and Prevention. Results show that as for socio-demographic factors, being male, lower economic status, being middle school student, and having poor academic grade were; as for household factors, youth-led, one-parent, grandparent(s), multicultural, and North Korean defectors family were; as for social support factors, the absence of family support, the absence of friend support and the absence teacher support were; and as for health-related factors, less exercise, higher level of stress, and lower level of subjective happiness were associated with increased internet using time. Based on these results, convergent implications about effective intervention strategies that adolescents can use internet appropriately were discussed in the section of conclusion.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.14 no.1
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• pp.211-217
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• 2014

The smart revolution led by Smart Phone in our daily lives is changing the paradigm in general. These smart revolution has provided us a lot of convenience, but on the other hand also appearing an inverse function. The host of the future of young people, especially by the excessive use of smart devices, there is a risk of side effects increased. In this study, the empirical analysis has been done to know how the used time of smart devices and youth sports activities affect to the emotional intelligence. Using regression analysis, the used time of smart devices showed negative relationship and the time of youth sports activities affected positively with the emotional intelligence. Additional analysis of the amount of reading also affected positively to the motional intelligence as a conclusion. Through this study, as a conclusion, traditional activities, namely sports activities and reading to help the youth developing emotional intelligence, while the use of smart devices inhibits the development of emotional intelligence of youth.

• Proceedings of the Korean Society of Computer Information Conference
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• 2014.07a
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• pp.507-508
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• 2014

요즘 스마트폰을 사용하는 사람의 수가 늘어감에 따라 무분별한 스마트폰 사용으로 인한 스마트폰 중독의 사태가 일어나고 있다. 특히, 본인이 스마트 폰을 소유 하지는 않지만 부모의 스마트 폰을 가지고 사용하는 영유아들은 자제력이 부족할 뿐만 아니라 중독의 위험이 청소년이나 어른들보다 높은 실정이다. 스마트폰을 직접 소유한 10대 청소년뿐만 아니라, 어른들 역시 무분별한 스마트폰 사용으로 일상생활에 지장이 많다. 본 논문에서는 자제력이 부족한 청소년이나 어른들에게 스스로 사용시간 설정을 통하여 무분별한 스마트폰의 사용시간을 자제 시킬 수 있는 스마트폰 사용제한 어플리케이션을 설계하고 구현하였다.

• Journal of the Korea Convergence Society
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• v.9 no.11
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• pp.153-159
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• 2018

The purpose of this study is to grasp the internet use time that young people use for purposes other than learning purpose, to grasp the perceived status of the youth according to internet use time and to grasp the interrelationships of them. Using the 2016 youth health behavior online survey, the odds ratios and 95% confidence intervals of perceived status according to internet use time were calculated by binary logistic regression analysis. The main results are as follows. In perceived health and perceived oral health the odds ratios of perceived who feel that they are perceived and unhealthy as the time spent using the Internet increased significantly compared to those who did not use the Internet for learning purposes. In the perceived body type, the odds ratio of being overweight increased significantly with longer internet use time. The odds ratios of perceived happiness were 1.19 times (CI = 1.10-1.30) higher than the perceived expectation of unhappiness when using the Internet for over 300 minutes. The use of the internet for a long time other than the purpose of learning may have a negative effect on the health and happiness of the youth, so we think that the recommended time for using the internet is necessary.

• Proceedings of the Korea Contents Association Conference
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• 2013.05a
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• pp.257-258
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• 2013

최근 스마트폰이 대중화 되면서 스마트폰을 사용하는 사용자의 계층이 다양화되고 있다. 그러나 스마트폰을 사용하는 사용자 계층 중 청소년이 다른 계층보다 스마트폰 게임에 쉽게 중독되어 다른 일상 생활이 힘든 상황이 발생하고 있다. 본 논문에서는 스마트폰 게임을 통해 일상 생활이 불가능한 청소년을 대상으로 게임 사용을 강제적으로 조절할 수 있는 인증 프로토콜을 제안한다. 제안 프로토콜은 사용자의 게임 시간과 접속 횟수 등의 정보를 이용하여 게임 사용을 자제하도록 함으로써 사용자의 게임중독을 예방하는 것을 목표로 하고 있다. 또한, 청소년이 온라인 게임 상에 물품을 구입할 경우 청소년의 부모에게 게임 아이템구입 확인 메시지를 전달하여 게임 사용을 제한한다.