• Korean Journal of Childcare and Education
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• v.13 no.6
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• pp.111-126
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• 2017

Objective: The purpose of this study is to investigate the moderating role of Ego-Resilience between Peer Attachment and Mobile Phone Dependency in late adolescence. Methods: The participants were 2056 third year high school adolescents (1,041 boys and 1,015 girls) from the Korea Youth Panel Study (KYPS), a national representative of Korean Children and adolescence. Hierarchical Regression was used for data analysis. Results: First, the correlation between peer attachment, ego-resilience and mobile phone dependency were all significant. Second, ego-resilience takes the role of moderator for mobile phone dependency. In detail, ego-resilience relieves the mobile phone dependency caused by 'peer relationships' or 'conflict in peer relationships. Conclusion/Implications: Ego-resilience was found to control the relationship between peer attachment and mobile phone dependency. Therefore, in order to lower the dependence of mobile phones in adolescents with low peer attachment, a program that can enhance ego-resilience is needed.

• Korean Journal of Child Studies
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• v.31 no.6
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• pp.1-13
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• 2010

This study examined the time-dependent effects of changes in private education on the trajectories of academic achievement among early adolescents. Five-wave data was employed from the KYPS; the participants being 2844 (1524 boys, 1320 girls). All were 4th graders in 2004 and became 8th graders in 2008. Latent growth curve model indicated that academic achievement significantly decreased over the five time points, but there were significant individual differences as well. Participants who reported higher initial levels of academic achievement tended to decrease in academic achievement more slowly over time compared to participants who reported lower levels of initial academic achievement. The effects of private education on academic achievement were at their most powerful when participants were in the 4th grade. Private educational experiences among 6th graders had relatively less influence upon the academic achievement of 7th graders.

• Korean Journal of Child Studies
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• v.33 no.4
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• pp.1-17
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• 2012

This study examined the developmental trajectories of perceived level of stress and depression in Korean youth using longitudinal data from the Korean Youth Panel Study (KYPS) of 2,844youth (1,524 boys) across $4^{th}$ grade through $8^{th}$ grade. Latent growth modeling indicated the presence of age-related, significant increases in stress and depression for both boys and girls. Girls experienced greater in stress and depression than did boys. Multiple group analysis indicated that there was no significant sex difference in effects of stress on depression. Overall, increases in stress were associated with increases in depression levels for both boys and girls. Conceptual and clinical implications of the findings were discussed.

• Journal of Families and Better Life
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• v.26 no.6
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• pp.135-141
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• 2008

This longitudinal study investigated the causal relationships between academic achievement and self-esteem using data from a 4-year investigation(2003-2006). Academic achievements and self-esteem were assessed for a sample of adolescents (male 187, female 201) in KYPS (Korea Youth Panel Survey). Cross-lagged autoregressive analyses indicated that for academic achievement and self-esteem, these two variables were reciprocally interrelated in middle school. However, thereafter, middle school 3rd grade students' self-esteem influenced high school 1st grade students' academic achievement, while high school 1st grade students' academic achievement influenced high school 2nd grade students' self-esteem.

• Journal of Families and Better Life
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• v.26 no.4
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• pp.27-40
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• 2008

The purpose of this study was to investigate the effects of attachments to parents, teachers, and friends on delinquencies among elementary school students. Participants were 2844 elementary school students from the 2004-2006 panel 2 data of the Korea Youth Panel Survey(KYPS). For analyses of research questions, frequencies, descriptive statistics, independent sample t-tests, Pearson correlations and multiple regression analysis were used with SPSS 12.0. Results of the study indicated that : (1) For boys, attachments to parents reduced delinquencies more than for girls. However, for girls, attachments to teachers reduced delinquencies more than for boys. (2) Attachments to friends influenced delinquencies negatively in the 4th grade, but influenced delinquencies positively in the 6th grade. (3) When boys and girls kept in touch with delinquent peers, attachments to parents largely influenced delinquencies.

• Journal of Families and Better Life
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• v.28 no.4
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• pp.117-125
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• 2010

This study examines the additive and interactive effects of temperament and parenting on children's reactive and proactive aggression. The participants were 2844 4th graders(1524 boys, 1320 girls) from the Korea Youth Panel Study(KYPS). The results show sthat : (1) Children's emotion regulation influenced reactive aggression, whereas sensation seeking influenced proactive aggression. Children's anger/frustration influenced both subtypes of aggression. (2) Harsh parenting influenced children's proactive aggression. (3) There are some significant temperament $\times$ temperament and temperament $\times$ parenting interactions.

• Korean Journal of Child Studies
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• v.30 no.1
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• pp.11-25
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• 2009

This study aimed to investigate protective factors and risk factors in elementary students' life satisfaction. Participants were 2844 (1524 boys, 1320 girls) children who grades were 4th, 5th, 6th in KYPS (Korea Youth Panel Survey). Data mining decision tree model was performed with sex, appearance, delinquency, family income, attachment to parents, parental monitoring, attachment to teachers, academic achievement, peer delinquency, and attachments to peer. The results revealed that : (1) For 4th graders, academic achievement, attachment to parents, and appearance were significant predictors for life satisfaction. (2) For 5th graders, attachment to parents, academic achievement, parental monitoring and appearance were significant predictors for life satisfaction. (3) For 6th graders, attachment to parents, appearance, parental monitoring and delinquency were significant predictors for life satisfaction. Protective factors and risk factors were changed according to interactions between significant independent variables. These results suggest that children's diverse conditions should be considered individually in programs for children's life satisfaction.

• Korean Journal of Child Studies
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• v.30 no.1
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• pp.77-88
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• 2009

This study explored moderating effects of parental attachment andparental monitoring in the relationship between stress and problem behavior among Korean adolescents. The Korean Youth Panel Study (KYPS) was used as sample data with a total of 2,503 11th grade students involved in this study. Results of hierarchical regression analyses showed that parental attachment (for both male and female adolescents) and parental monitoring (for male adolescents) played the role of moderators in the relationship between stress and problem behavior. That is, good parental attachment and monitoring reduced stress inducing problem behavior for male adolescents but only parental attachment reduced stress inducing problem behavior for female adolescents. Conclusions highlighted the importance of parents' role in the prevention of adolescent problem behavior.

• Journal of the Korean Home Economics Association
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• v.48 no.10
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• pp.89-103
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• 2010

The purpose of this study was to examine the developmental trajectories of adolescents' internalizing problem behaviors. The data came from 3,188 middle school students through their participation in the Korea Youth Panel Survey(KYPS). Adolescents with a high level of internalizing problem behaviors in the first year showed a rapid decline in these behaviors over time, whereas for adolescents with a low level of these behaviors in the first year the decline was slow. The predictors of the developmental trajectories were related to individual variables, such as gender, self-esteem, self-control, stress, self-stigmatization, and academic achievement. The developmental trajectories of adolescents' internalizing problem behaviors were classified into four groups. The predictors of the patterns of developmental trajectories in adolescents' internalizing problem behaviors appeared to be related to individual variables.

• Journal of Families and Better Life
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• v.28 no.5
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• pp.225-234
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• 2010

The purpose of this study is to examine moderating effect of social relationship on the relationship between academic stress and psychological health among of adolescents. This data used in this study used data was derived from the wave 2-4(2004-2006) of Korean Youth Panel Study (KYPS). The results show that social relationship(parent-child relationship and peer relationship) had a moderating effect on academic stress and psychological health of adolescents. In short, it was verified that in the case of good social relationship, academic stress could actually buffer the effect of psychological health. However, it terms of parent-child relationship, it was not confirmed to have a moderating effect on academic stress and psychological health in the 11th grade. The results from above suggest that schools and related facilities adolescent should consider the program to reinforce social relationship and the timing of the intervention.