• Korean Journal of Child Studies
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• v.23 no.3
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• pp.139-148
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• 2002

This study examined differences in children's social competence by number, birth order, and sibling relation types. The subjects were 489 three- to five-year old boys and girls enrolled in 4 kindergartens in Seoul and Gyeonggi Province. Instruments were the California Preschool Social Competency Scale and a questionnaire for the home environmental variables. Data were analyzed by ANCOVA, Tukey test and Cronbach ${\alpha}$. The major findings were that siblings' social competence was higher than only children, first-born children's social competence was higher than the later born, and older brother's social competence was higher than younger brothers and sisters.

• The Journal of Korean Association of Computer Education
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• v.15 no.2
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• pp.9-18
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• 2012

This study investigated the extraction algorithm fitting for variables of adolescents' computer use type with the sample from KYPS data (3409 in the second grade of the junior high school; 1704 boys and 1705 girls). The results of the decision tree model revealed that : (1) Gender, computer use time, misdeed friends, parent supervision, other agreement of misdeed, parent study expectation, self-control, teacher attachment, and sibling relation were significant for entertainment type. (2) Gender, cyberclub, computer use time, self-belief, online misdeed were significant for relation type. (3) Study enthusiasm, personal study time, optimistic disposition, study and spare time, cyberclub, self-belief, and other people criticism were significant for information type. These results suggest that adolescents' diverse conditions should be considered for using computer more efficiently.