• The Korean Journal of Community Living Science
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• v.24 no.3
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• pp.289-300
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• 2013

The aims of this study are to investigate the differences of the preschoolers' executive function and verbal ability according to their age, and to identify whether the preschoolers' executive function is related to their verbal ability. The participants in this study are 151 children, ages 3-and 5-years old from five child-care centers located in a middle-income region of Seoul. Statistical methods used for the data analysis are the frequencies, means, standard deviations, an independent t-test, and Pearson correlation. The major findings are as follows. First, an age difference is found for children's executive function. The 5-year-olds are more likely to succeed on tasks of executive function than the 3-year-olds. Also, age difference is found for children's verbal ability. The 5-year-olds perform better on tests of verbal ability than the 3-year-olds. Last, the 3-year-olds' and 5-year-olds' executive function is related to their verbal ability. Inhibition and cognitive flexibility are significantly correlated with verbal ability. These results suggest that preschoolers' executive function and verbal ability develop during preschool age. These results also suggest that preschoolers' executive function is related to their verbal ability.

• Korean Journal of Child Studies
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• v.36 no.6
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• pp.147-164
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• 2015

The purpose of the present study was to examine the trajectories of children's negative emotionality and mother's social parenting over a 3-year period (for children at ages 1-3) and to then analyze the bidirectional effects between the two variables. The longitudinal casual relationship among children's negative emotionality, mother's social parenting and peer interaction at age 3 was also examined. The data, taken from the Panel Study on Korean Children, were analyzed using latent growth modeling. The results were as follows. First, the level of negative emotionality was seen to have increased by 2 years of age, whereas the level of mother's social parenting decreased by this point. Second, higher initial negative emotionality predicted decreases in mother's social parenting, However, higher initial mother's social parenting predicted increases in children's negative emotionality. The initial level and slope of mothers' positive parenting predicted peer interaction at age 3, while only the slope of negative emotionality predicted peer interaction. These findings suggest that temperament and parenting predict changes in each other and peer interaction.

• Korean Journal of Child Studies
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• v.36 no.5
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• pp.135-153
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• 2015

The purpose of this study was to investigate false belief understanding and justification reasoning according to information of reality amongst children aged 3, 4 and 5. Children aged 3 to 5 years (N = 176) participated in this study. Each child was interviewed individually and responded to questions designed to measure his/her false belief understanding. Every child responded to the false belief task under two different information conditions of reality(reality known vs reality unknown). For more specific analysis, children's reasoning responses were also recorded. The major findings of this study are as follows. Children could understand false belief more easily under reality unknown conditions. Specifically, the influences of information conditions were crucial to 3-year-olds but not to 4- and 5-year-olds. Although 3 year olds were able to avoid the systematical errors inherent in the false belief task, they still did not understand the false belief itself. This study provides specific aspects of false belief understanding and its relevance to general changes in cognitive development.

• Korean Journal of Child Studies
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• v.38 no.1
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• pp.117-126
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• 2017

Objective: The purpose of this study was to investigate young children's nonsymbolic magnitude comparison ability according to ratio limit and task condition. Methods: The participants included 40 3-year-old children, 42 4-year-old children, and 41 5-year-old children recruited from 4 childcare centers located in Seoul, Korea. All magnitude comparison tasks were composed of image material tasks and concrete material tasks. In addition, each magnitude comparison task varied with the ratio of the two quantities; 0.5 ratio, 0.67 ratio, 0.75 ratio. Results and Conclusion: The results revealed that 3-, 4-, and 5-year-old children could perform nonsymbolic magnitude comparison tasks without learning experiences. Also, 3-, 4-, and 5-year-old children could perform concrete material tasks better than image material tasks in nonsymbolic magnitude comparison tasks. Furthermore, children's performance on nonsymbolic magnitude comparison tasks indicated the ratio signature of the approximate number system. Children have a degree of numerical capacity prior to formal mathematics instruction. Also, children were influenced by task conditions or sense stimulus when they processed numerical information. Furthermore, the approximate number system can be used in understanding the ordinality of number.

• Korean Journal of Child Studies
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• v.35 no.3
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• pp.49-69
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• 2014

The purposes of this study were (1) to investigate children's moral judgment, justification reasoning in terms of aggressive behavior, and (2) it examined the relationship to false belief understanding. Children aged between 3 to 5 years(N = 120) participated in this study. Each child was interviewed individually and responded questions designed to measure his/her moral judgment and justification reasoning and false belief understanding. The 12 pictorial tasks consisted of selfish and altruistic intentions and three different types of acts (physical, verbal, relational) as responses to aggressive behavior. The results indicated that the kind of moral judgment used was different according to the intention and the types of acts. There were significant differences in children's justification reasoning according to the age and the types of acts. There was a positive relationship between false belief understanding and moral judgment, justification reasoning. This paper also provided a detailed discussion of the results and recommendations in the context of more general cognitive developmental changes.

• Korean Journal of Childcare and Education
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• v.15 no.3
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• pp.39-60
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• 2019

Objective: The purpose of this study was to analyze the Nuri-curriculum daycare programs for 3, 4, and 5-year-olds based on the Child Welfare Act. Methods: Data were analyzed according to the analysis criteria for 195 children's safety education programs in the Nuri-Program. The analyzed data used frequency and percentages. Results: First, life safety education was the most important element. And after looking at the contents category of the Child Welfare Act, the results in order are as follows: "raffic safety"; "Health and hygiene management, including the prevention of contagious diseases and drug abuse"; "Safety measures against disasters"; "Precaution and prevention of disappearance and abduction"; and "Prevention of sexual violence and child abuse." Second, there were many safety education activities in accordance to chronological age (3-to 5-years old). Health and safety by subject, season, and life tools were more frequent. By type of activity, conversation and language activity, fairy tales, and plays were the most common activities. Conclusion/Implications: This suggests the need to systematically plan safety education content through a program that links safety-related laws and elements related to the Nuri curriculum in child care centers.

• Korean Journal of Human Ecology
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• v.23 no.2
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• pp.293-302
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• 2014

The purpose of this study was to examine the effect of traditional fairy tales verbal expression education on 3-year-old children's social skills. The subjects of this study were 50 3-year-old children at four different private daycare centers in the Kyungnam province. 25 preschoolers were selected as an experimental group, and the others were selected as a control group. The collected data were analyzed by the statistical package SPSS by t- test, MANOVA and ANOVA. The findings of the study were as follows: First, differences between the experimental group and the control group in social skills were significant. There were differences between the experimental group and the control group in problem solving and self-confidence. There was no difference in emotional expression and sense of order. Second, the Cohen's effect size shows that traditional fairy tales verbal expression education effects children's problem solving and self-confidence.

• Journal of the Korean Home Economics Association
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• v.47 no.7
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• pp.117-128
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• 2009

The purpose of this study was to estimate the prevalence of ADHD based on estimation of ADHD rating scale between mother-teacher and teacher-teacher. In total, 491 mothers and 23 teachers rated 689 5-year-old children on the K-ADHDDS. Descriptive statistics, in addition to independent and paired samples t-test were performed. Overall, the percentages of children with ADHD on the rating scale were 3% in combined type, 7.1-8.6% in predominately hyperactive-impulsive type, and 4.2% in predominately inattentive type. Boys tended to show greater tendency of ADHD than girls’: Overall, ADHD tendency in boys was 1.3 times greater than girls. Specially, 2.3 times more for hyperactivity, 1.4 times more for impulsivity, and 3.4 more for inattention. The correlation between mothers’ and teachers’ ratings were .35 for total, .40 for hyperactivity, .24 for impulsivity, and .28 for inattention, and there were no significant differences. Alternatively teacher and teacher ratings were .71 for total, .70 for hyperactivity, .70 for impulsivity, and .67 for inattention, and there were significant differences in inattention subscale(p < .01).

• Journal of the Korean Academy of Child and Adolescent Psychiatry
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• v.15 no.2
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• pp.115-122
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• 2004

It is difficult to think of any behavioral process that is more intrinsically important to human beings than social attachment. Feeding, sleeping and locomotion are all necessary for survival, but humans are 'a social animal' and it is our social attachment that we live for. One of the early pioneers in this area, Harry Harlow, described the different behavioral processes that are involved in the formation of parent-infant, filial and pair(male-female) bonds. Each of these involves multi-sensory processing and complex motor responses. Over the past decades, studies in a range of vertebrates, including humans, have begun to address the neural basis of attachment at a molecular, cellular and systemic level. This review describes some of important insights from these works, involving three different areas：1) Neurobiological research of infant-parent, parent-infant attachment, 2) Animal studies regarding attachment, 3) Neurobehavioral studies of maltreatment/deprivation causing serious breakdown of attachment relationship in humans.

• The Journal of the Korea Contents Association
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• v.21 no.3
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• pp.217-231
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• 2021

This study focuses on the effects of child daycare center teacher's communication skills on group cohesiveness, empathy, and communication satisfaction. For research purposes, 197 child daycare center teachers were selected for survey on communication skills, group cohesiveness, empathy, and communication satisfaction. Daycare centers were categorized into three groups, including national, private, and home centers. Research results displayed that the communication skills of daycare center teachers had effects on group cohesiveness for all three groups of national, private, and home centers. The communication skills of daycare center teachers provided positive effects on group cohesiveness, contributing to accomplishment of organizational goals. In addition, the communication skills of daycare center teachers had effects on empathy for all three groups of national, private, and home centers. The higher level of communication skills of daycare center teachers will ultimately lead to enhanced skills in understanding and sympathizing with children, parents, and other teachers. Third, the communication skills of daycare center teachers had effects on communication satisfaction for all three groups of national, private, and home centers. The higher level of communication skills of daycare center teachers displayed enhanced level of communication satisfaction between children, parents, and other teachers.