• Korean Journal of Child Studies
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• v.26 no.5
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• pp.1-14
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• 2005

The purpose of this study was to examine the relation between forms of children's solitary play and temperament, problem behaviors. Seventy-six children of four-year-olds were observed during free play. Children's temperament was measured by mothers of participants. Children's problem behaviors were measured by teachers. Following from Coplan et al(1994), this study were analyzed three aggregate measures of solitary play consisting of reticent behavior, solitary-passive play, and solitary-active play. The results of this study shows that first, the highest frequency of solitary play's forms was reticent behavior, followed by solitary-passive play, then solitary-active play. There weren't any differences in children's solitary play according to their gender. Second, there were significant differences among forms of children's solitary play and temperament. And there were gender differences in the correlates of different forms of solitary play. Third there were significant differences among forms of children's solitary play and problem behaviors. Also, there were gender differences in the correlates of different forms of solitary play. This result points out the important of solitary play and distintion of solitary play'forms.

• Korean Journal of Child Studies
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• v.25 no.5
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• pp.41-58
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• 2004

This study examined the relations between children's Impulsivity temperament, socio-dramatic play, and self-regulation of 4-year-old children. Subjects were 117 4-year-old children(59 boys and 58 girls) selected from three kindergartens. Each mother completed a questionnaire on her child's temperament. Naturalistic observations of total socio-dramatic play, complex socio-dramatic play, solitary dramatic play and of self-regulation in two classroom contexts - clean-up periods and group circle time - were conducted for obtaining data. Significance was analyzed by Pearson's correlation and multiple regression analysis. Children's Impulsivity was negatively related to self-regulation and to total and complex socio-dramatic play, but impulsivity was positively related to solitary dramatic play. Total and complex socio-dramatic play was positively related to self-regulation while solitary dramatic play was negatively related to self-regulation. Total and complex socio-dramatic play, and solitary dramatic play displayed a mediating role between impulsivity and self-regulation during clean-up periods.

• Korean Journal of Child Studies
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• v.1
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• pp.15-27
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• 1980

PURPOSE This study was intended to analyze the play-form of normal preschool children as related to age, sex, educational experience and social maturity. METHOD 1. Subjects The subjects of this study were eighty seven 3-, 4- and 5-year-old preschool children attending educational institutions in Seoul. 2. Instruments The instruments used in this study consisted of twenty one-minute observations in 5 preschool settings and a questionnaire designed to measure the children's social maturity filled in by their parents. The observations provided information on the children's free play, that is 1) play-form: solitary, parallel and group play 2) use/non-use of toys 3) behavior: play, activity, doing nothing, onlooking 4) stationary/moving dimensions 5) play group size The questionnaire measured such factors as communication, socialization, locomotion, self-help and self-direction. 3. Data Analysis Data analysis consisted of percentage and Chi square. RESULTS 1. Play-Form The relationship between age and play-form proved to be significant at the .05 level. That is, in both boys and girls, solitary play decreased with age and group play increased with age while parallel play maintained a similar position. The relationship between sex and play-form proved to be significant at the .05 level in 3-& 4-year-old children, but not significant in 5-year-old children. That is, in their $3^{rd}$ year boys engage in the solitary play more than girls and in their $4^{th}$ year boys engage in more group play than girls. 2. Toys Without differentiation of sex and age, cases of using toys in play exceed those cases where toys were not used. 3. Behavior The relationship between age and behavior proved to be significant at the .05 level in both boys and girls. That is, with increase of age, play decreased and activity increased in boys while play increased and doing nothing decreased in girls. 4. Moving Status Totally, moving occurred more frequently in play than stationary status. Moving proved not to have a significant relationship with age, but it did Navel a significant relationship with sex at the .05 level. That is, moving tended to increase with the increase in age in both boys and girls, but not at a significant level. Boys moved significantly more than girls in all three age levels. 5. The Relationship between Educational Experience and Play-Form There was a tendency for children with longer preschool experience to engage in less solitary play and more group play than children who had less than one semester of preschool experience, but this difference was not statistically significant. 6. The Relationship between Social Maturity and Play-Form The high social maturity group engaged in less solitary play and more group play than the low social maturity group, but this was not a statistically significant difference. 7. Play Group Size Play group size was 2~10 children, but the majority of play groups consisted of 2~3 children. There was a tendency for play groups composed of 2 children to decrease with age and play groups composed of 3 children to increase with age. No significant difference was found between the sexes in play group size.

• Korean Journal of Child Studies
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• v.35 no.2
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• pp.25-41
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• 2014

The purpose of this study was to investigate the relationships between play behaviors and young children's playfulness in a variety of play space environments. The subjects were 150 4-year old children of 29 mixed-age classes in childcare centers of Seoul and Gyeonggi area. The results were as follows; (1) Their play behaviors differed according to their play environment in terms of classroom spaces. Solitary-active play behaviors were more frequently observed in large play spaces than small. (2) Leading participation, cognitive flexibility, voluntary full immersion, and total playfulness scores correlated negatively with reticent behavior. Leading participation, voluntary full immersion, and total playfulness scores, on the other hand, correlated positively with group play behavior. (3) In small play spaces, leading participation, voluntary full immersion correlated negatively with reticent behavior, but leading participation correlated positively with group play. In middle play spaces, cognitive flexibility correlated negatively with reticent behavior. In large play spaces, voluntary full immersion correlated negatively with parallel play, but leading participation, cognitive flexibility, expressions of joy, voluntary full immersion, and total playfulness score correlated positively with group play.

• Korean Journal of Child Studies
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• v.17 no.1
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• pp.153-171
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• 1996

The purpose of this study was to examine children's social-cognitive modes of play in same-age and mixed-age kindergarten classrooms. The subjects were 45 children. in three classrooms of 4-year-olds, 69 children in three classrooms of 5-year-olds, and 60 children in three mixed-age classrooms of 4- and 5-year-olds. Observations were conducted by videotape recordings. Observation periods were of five-minutes duration. There were ten observations of each child's indoor free-play periods. Observational data were collected by the time sampling method with the social cognitive play behavioral checking list based on an adaptation of one devised by Rubin(1985). The data was analyzed by t-test with the SAS computer program. Four- and five-year-olds in mixed-age classrooms were more likely to engage in "complex" modes of play than 4- and 5-year-olds in same-age classrooms. Four-year-olds in same-age classrooms were more likely to engage in solitary-functional, parallel-functional, and group-functional play than 4-year-olds in mixed-age classrooms. However, 4-year-olds in mixed-age classrooms were more likely to engage in group-constructive, group-dramatic, solitary-game, and group-game play than 4-year-olds in same-age classrooms. Five-year-olds in same-age classes were more likely to engage in solitary-functional and parallel-functional play than 5-year-olds in mixed-age classes. Five-year-olds in mixed-age classes were more likely to engage in group-constructive, group-dramatic, and group-game play than their counterparts in same-age settings.

• International Journal of Naval Architecture and Ocean Engineering
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• v.12 no.1
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• pp.283-296
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• 2020

A numerical model is established to investigate the run-up of a solitary wave after propagating over a triangular saw-tooth-shaped submerged breakwater. A rectangular-shaped submerged breakwater is simulated for comparison. Several factors, including the submerged depth, the lagoon length and the beach slope, are selected as independent variables. The free surface motions and velocity fields of the solitary wave interacting with the submerged breakwater are discussed. The results show that the submerged depth and lagoon length play significant roles in reducing the run-up. The influence of the beach slope is not significant. At the same submerged depth, the triangular saw-tooth-shaped submerged breakwater has only a slightly better effect than the rectangular-shaped submerged breakwater on the run-up reduction. However, a calmer reflected wave profile could be obtained with the rougher surface of the saw-tooth-shaped submerged breakwater. The study conclusions are expected to be useful for the conceptual design of saw-tooth-shaped submerged breakwaters.

• Korean Journal of Child Studies
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• v.28 no.1
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• pp.17-35
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• 2007

This study examined whether sequential transition patterns of social play differed by children's social competence. The social competence of sixty 5-year-old children was rated by their teachers using the Social Competence Scale(NICHD Early Child Research Network, 1996). Children's social play was observed during free play and coded by criteria developed by Robinson et al(2003). Results showed differences in children's social play behaviors by social competence and differences in the transition patterns of children's social play level by social competence. Children with higher social competence showed a transition pattern moving toward cooperative-social interaction, whereas children with lower social competence showed a transition pattern moving backward to solitary or onlooker behavior.

• Korean Journal of Child Studies
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• v.34 no.1
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• pp.175-189
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• 2013

The purpose of this study was to investigate the differences in children's play behaviors in terms of their levels of playfulness, leadership and communicative ability. The subjects were 152 children aged between 3 and 4, and their 20 teachers at 10 child care centers in the Seoul and Gyeonggi area. The results of this study suggested that play behaviors were related to the level of playfulness, leadership and communicative ability in 3 and 4 years old children. Among these children, those who scored highly in terms of their playfulness, leadership and communicative ability were involved more frequently in both 'group play' and 'symbolic play' whereas those who achieved lower scores were more frequently involved in 'solitary play' and 'functional play'. However, in case of 'constructive play', significant results were not found in relation to the independent variables named in this study. 'Parallel play' and 'games with rules' were the only categories within which the findings revealed that children's play behaviors have shown different patterns according to the age of the child and to the levels of those three independent variables mentioned above.

• The Korean Journal of Physiology and Pharmacology
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• v.19 no.3
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• pp.275-281
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• 2015

Orthostatic hypotension is most common in elderly people, and its prevalence increases with age. Attenuation of the vestibulo-sympathetic reflex (VSR) is commonly associated with orthostatic hypotension. In this study, we investigated the role of glutamate on the vestibulo-solitary projection of the VSR pathway to clarify the pathophysiology of orthostatic hypotension. Blood pressure and expression of both pERK and c-Fos protein were evaluated in the nucleus tractus solitarius (NTS) after microinjection of glutamate into the medial vestibular nucleus (MVN) in conscious rats with sodium nitroprusside (SNP)-induced hypotension that received baroreceptor unloading via sinoaortic denervation (SAD). SNP-induced hypotension increased the expression of both pERK and c-Fos protein in the NTS, which was abolished by pretreatment with glutamate receptor antagonists (MK801 or CNQX) in the MVN. Microinjection of glutamate receptor agonists (NMDA or AMPA) into the MVN increased the expression of both pERK and c-Fos protein in the NTS without causing changes in blood pressure. These results indicate that both NMDA and AMPA receptors play a significant role in the vestibulo-solitary projection of the VSR pathway for maintaining blood pressure, and that glutamatergic transmission in this projection might play a key role in the pathophysiology of orthostatic hypotension.

• Korean Journal of Childcare and Education
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• v.12 no.3
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• pp.79-97
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• 2016

The purpose of this study was to investigate the effects of children's multiple intelligences and temperaments on their play behaviors. In order to achieve this, 155 mothers and 21 teachers of children aged 4 to 6 years old were invited to participate in an observe-reported survey. The data were analyzed using descriptive statistics, Cronbach's ${\alpha}$, Pearson's correlation, and hierarchical regression analysis using SPSS version 18.0. It was found that both multiple intelligences and temperament types have partial influences on play behaviors of young children; it was confirmed that among multiple intelligences of children, logical-mathematical intelligence influences onlooker behaviors in a positive way, body-kinesthetic intelligence has a positive effect on rough-and-tumble play, and musical intelligence positively affects social play during free-choice play. Also, children with a difficult temperament were more likely to participate in solitary play than children with a slow temperament. These results imply that teachers' guidance and involvement of children's play should differ by types of temperament and levels of multiple intelligence in children.