• Journal of the Korean Home Economics Association
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• v.39 no.3
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• pp.135-149
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• 2001

The purpose of this study was to investigate depression and school adjustment of institutionalized children and adolescents according to their ego-identity, gender, grade(age), relationship with parents before entering the institution, cause of entering the institution, duration of entering the institution, parents'visiting, psychological environment of institution. The subjects were 121 5th and 6th graders(59 boys and 62 girls), 135 middle school (58 boys and 77 girls), and 85 high school students (44 boys and 41 girls), who were institutionalized in Seoul. The data were analyzed by t-test, one-way and two-way ANOVA, Scheffe'test, and multiple regression analysis. The major findings of this study were as follows: 1) Depression and school adjustment of institutionalized children and adolescents were different according to their ego-identity, relationship with parents before entering the institution and psychological environment of institution. And school adjustment of institutionalized children and adolescents were different according to grade(age). 2) In regression analysis models, ego-identity and cause of entering the institution were significant predictors of depression, and ego-identity more predicted to depression than cause of entering the institution. And ego-identity and age(grade) were significant predictors of school adjustment, and ego-identity predicted to school adjustment as well as grade(age).

• The Mathematical Education
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• v.48 no.3
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• pp.235-263
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• 2009

The purpose of the study was to investigate the influence of children's understanding of fractions in mathematics problem solving. Kieren has claimed that the concept of fractions is not a single construct, but consists of several interrelated subconstructs(i.e., part-whole, ratio, operator, quotient and measure). Later on, in the early 1980s, Behr et al. built on Kieren's conceptualization and suggested a theoretical model linking the five subconstructs of fractions to the operations of fractions, fraction equivalence and problem solving. In the present study we utilized this theoretical model as a reference to investigate children's understanding of fractions. The case study has been conducted with 6 children consisted of 4th to 5th graders to detect how they understand factions, and how their understanding influence problem solving of subconstructs, operations of fractions and equivalence. Children's understanding of fractions was categorized into "part-whole", "ratio", "operator", "quotient", "measure" and "result of operations". Most children solved the problems based on their conceptual structure of fractions. However, we could not find the particular relationships between children's understanding of fractions and fraction operations or fraction equivalence, while children's understanding of fractions significantly influences their solutions to the problems of five subconstructs of fractions. We suggested that the focus of teaching should be on the concept of fractions and the meaning of each operations of fractions rather than computational algorithm of fractions.

• Korean Parent-Child Health Journal
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• v.5 no.2
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• pp.161-176
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• 2002

Among the causes of childhood behavioral problems - that is, physiological, psychological, and environmental factors -, the common element of non-organic psychological and environmental factors is influences from the parents. Roles of mother who does the biggest emotional exchange with the child after birth may have substantial association with the childhood behavioral problems. In this connection, the present explanatory study was conducted for the purpose of understanding the causal structural relationship in which mother's child caring behaviors affect child behavioral problems. The data collection period was July 2 - 7, 2001. The subject was 4th, 5th, 6th graders' mothers in 4 elementary schools located in Daejoen city and 299 surveys were used in the analysis. As for the tools used in this study to assess the mother's child caring Behavior Scale by Park, Seong-Yeon and Yi, Sook (1990) was used to measure the mother's behaviors. The child behavioral problems were measured with the Korean-Child Behavior Checklist (K-CBCL), standardized into the Korean version by O, Gyung-Ja, Yi, Hye-Ryon, Hong, Gang-Eui, and Ha, Eun-Hye. For the data processing, the frequency and the percentage were calculated, and the analyses of variance, correlation were carried out. The result of this study is summarized as follows: First, the examination of the effect of mother's general characteristics on the mother's caring behavior shows that significant differences are made by the active participation (p=0.020) in the occupation, affection(p=0.000), authority control(p=0.013), achievement(p=0.030), active participation(p=0.032) in the education level, consistency regulation(p=0.007) in the religion. Second, the examination of the effect of mother's caring behaviors on the child behavioral problems shows that significant differences are made by some child behavioral problems in the affection, achievement, consistency regulation, authority control, over protection caring behaviors. Third, as for the correlation between mother's child caring behavior and child behavioral problems, a significant correlation is revealed between the negative child caring behavior and child behavioral problems.

• The Korean Journal of Food And Nutrition
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• v.24 no.4
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• pp.481-488
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• 2011

The purpose of this study was to investigate the relations of breakfast skipping and dietary habits according to breakfast intake frequency. Subjects were 5th and 6th graders of elementary school(n=423) in Gyeonggi area. As a result of analyzing the breakfast intake frequency, 'Having everyday' showed the highest 63.4%, followed by '4~6 times' 16.5%, '2~3 times' 13.5% and '0~1 times' 6.6%. As a result of analyzing the relations between mother and child in the breakfast intake frequency, it showed that the more mothers skipped breakfast, the more their children skipped it. For the reason of skipping breakfast, 'To be in time for school' showed the highest percentage. As a result of analyzing the perception of awareness for the importance of nutrition and dietary habit according to the breakfast intake frequency, there was a statistically significant difference in breakfast intake, dietary habits, selection and intake of proper food, disease and health problem according to the breakfast intake frequency. As a result of study, it is necessary that nutrition education should not be limited to children but expanded to their parents in order to increase the efficiency and effectiveness of nutrition education between school and home.

• The Journal of Korean Association of Computer Education
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• v.7 no.5
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• pp.45-56
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• 2004

With recent surge of Internet use, many people become concerned with side effects of Internet. Especially Internet addiction has become a significant issue. As Internet users become much younger than before, Internet addiction is salient even among elementary school students. While much research has been conducted on adolescents' addiction, only a little research has been conducted on elementary students' Internet addiction. In addition, it is necessary to use a standardized and reliable evaluation tool that is designed to assess the level of children's and adolescents' Internet addiction. The purpose of this study is to grasp the realities of elementary students' Internet addiction using an evaluation tool developed for elementary and secondary students, and to analyze the factors affecting Internet addiction. A survey was conducted to 1,382 5th and 6th graders selected from nationwide schools. The results of this study shows that 5.5% of the sample students are in the stage of serious addiction, and 12.4% in the stage of early addiction. In addition, the degree of Internet addiction significantly differs by various variables such as demographic factors, the experience of Internet use, family-related traits, and social activities.

• Journal of The Korean Association of Information Education
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• v.12 no.4
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• pp.459-467
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• 2008

Most of elementary school students possess computers at home, and learn about ICT in their school. But the extreme use of computer games may have negative effects on students' learning and life style. In this research, we analyzed the current status of 5th and 6th graders' computer game addiction in Daejeon, ChoongchungNam-Do and ChoongchungBuk-Do areas. And we have also investigated the relationship of students' computer game addiction with their self control abilities and the abilities to adjust to their school life. As the results of the research, we discovered that 15.6% of respondents showed strong possibilities of computer game addiction. Boys, students living in rural areas and students with relatively low grade showed strong possibilities of game addiction. In addition, it was found that as students showed high scores in their self control abilities and the abilities to adjust to school life, they demonstrated less possibilities to be addicted to computer games.

• Child Health Nursing Research
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• v.12 no.4
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• pp.514-522
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• 2006

Purpose: The purpose of this study was to identify the factors of child behavioral problems and construct a descriptive model that explains child behavioral problems for school age children. Method: The participants in the study were 586 4th, 5th, 6th graders and their mothers. The children attended 8 elementary schools located in Taejon city and their mothers. The tools used in this study was the Mother's Child Raising Behavior Scale by Park, Seong-Yeon and Yi, Sook(1990). To measure child's self esteem, the Self Esteem Scale by Kim(1987) was used; child perceived social support was measured with the Social Support Evaluation Scale by Dubow and Ullman(1989), and childhood behavioral problems were measured with the Korean standardized of version of the Korean-Child Behavior Checklist(K-CBCL)(1997). Descriptive statistics and linear structural relationship(LISREL) modeling were used to analyze the data. SAS and LISREL 8.12a programs were used. Results: The overall fit of the hypothetical model to the data was good $>X^2=103.07(p=0.00)$, GFI=0.96, AGFI=0.94, RMSR=0.04, RMSEA=0.07, NFI=0.94, NNFI=0.95< Maternal child raising behaviors(T=2.21) and child perceived social support(T=10.29) had a significant, direct effect on a child's self esteem. Maternal child raising behaviors(T=-3.87), and child self esteem(T=-2.04) and had a significant total effect on child behavioral problems. These variables accounted for 63% of the variance of the child behavioral problems in the school age children. Conclusion: These finding have provided support for maternal child raising behaviors, child perceived social support, and child self esteem as predictive variables of behavioral problems in school age children.

• Korean Journal of Childcare and Education
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• v.17 no.5
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• pp.83-103
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• 2021

Objective: This study aimed to develop a longitudinal predictive model that identifies first-grade children who are at risk for ADHD and to investigate the factors that predict the probability of belonging to the at-risk group for ADHD by using machine learning. Methods: The data of 1,445 first-grade children from the 1st, 3rd, 6th, 7th, and 8th waves of the Korean Children's Panel were analyzed. The output factors were the at-risk and non-risk group for ADHD divided by the CBCL DSM-ADHD scale. Prenatal as well as developmental factors during infancy and early childhood were used as input factors. Results: The model that best classifies the at-risk and the non-risk group for ADHD was the LASSO model. The input factors which increased the probability of being in the at-risk group for ADHD were temperament of negative emotionality, communication abilities, gross motor skills, social competences, and academic readiness. Conclusion/Implications: The outcomes indicate that children who showed specific risk indicators during infancy and early childhood are likely to be classified as being at risk for ADHD when entering elementary schools. The results may enable parents and clinicians to identify children with ADHD early by observing early signs and thus provide interventions as early as possible.

• The Journal of the Korea Contents Association
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• v.12 no.1
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• pp.361-368
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• 2012

This study surveyed on a comparative study of the students' oral health knowledge and behavior between the elementary schools with(528) or without dental clinic(442) in Ulsan. Sang Jin had 11.6% students from single parent or parentless families, revealing a much higher percentage than that of Mun Hyeon 3.6%. The findings showed on oral health care the score of activities of students in Sang Jin about 'always brushing one's teeth after having snacks' 'having seen a dentist and gotten regular dental checkups' and 'having a lot of concern for one's oral health' was much higher than that of Mun Hyeon. Sang Jin earned statistically higher marks for having better oral health knowledge that 'Chocolate, cookies and candy easily cause decayed teeth', 'Fruit, milk and vegetables cleanse the teeth', 'Brushing teeth can be replaced with chewing gum after meals', and 'Brushing teeth in left & right is the best way to cleanse'. As the knowledge of oral health care differed depending on the graders 4th, 5th, 6th in Sang Jin, the higher their grade was in.

• Journal of Science Education
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• v.41 no.3
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• pp.480-498
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• 2017

This study analyzed the errors of 6th graders of elementary school in problem solving process of the measurement domain. By analyzing the errors that students make in solving difficult problems, this study tried to draw implications for teaching and learning that can help students reach their achievement standards. First, though the students were given enough time to deal with problems, the fact that about 30~60% of students, based upon the problems given, can't solve them show that they are struggling with a part of measurement domain. Second, it was confirmed that students' understanding of the unit of measurement, such as relationship between units, was low. Third, the students have a low understanding in terms of the fact that once the base is set in a triangle then the height can be set accordingly and from which multiple expressions, in obtaining the area of the triangle, can be driven.