The purpose of this study is to investigate the moderating effects of language abilities associated with between emotionality, attention deficit hyperactivity disorder (ADHD) and peer play interactions. Two hundred fifty-two participants were 3 year olds, with 136 boys and 116 girls. They were recruited from day care centers and preschools in Gyunggi province and Incheon city. Peer play interaction was assessed by the Penn Interactive Peer Play Scale (PIPPS). Emotionality was measured by Child Behavior Questionnaire (CBQ). ADHD was assessed by teacher ratings of ADHD syndrome. Language abilities were measured by Korean Wechsler Preschool and Primary Scale of Intelligence (K-WPPSI). Teachers completed questionnaires to assess peer play interactions, emotionality, ADHD. The results revealed that language abilities moderated relationships between emotionality and play in isolation. The magnitude of associations between emotionality and play in isolation was greater for high levels of language abilities. Moreover, there were moderating effects of language abilities associated between ADHD and play disruptions. Although ADHD was significantly associated with play disruptions, the association was stronger at the higher levels than the low levels of language abilities. It can be deduced that language abilities of 3 year old children affects the protection factor between emotionality and peer play isolation; whilst, it affects the risk factor on peer play disruptions and ADHD propensity.

The purpose of this study was to investigate the mediating and moderating effects of teacher-child relationships on children's social behavior and peer preference. The participants were 508 children and 28 head teachers of their classes. Teachers measured the children's social behavior and the teacher-child relationships. Peer preference was measured by peer nomination. The association between prosocial behavior and peer preference was partially mediated by teacher-child conflict. The association between withdrawal, aggression and peer preference was fully mediated by teacher-child conflict. The moderating effects of teacher-child conflict were found between prosocial behavior and peer preference. In addition, teacher-child conflict moderated the association between physical aggression and peer preference. 주제어 (Keywords) : 또래 선호 (peer preference), 교사-유아 관계 (teacher-child relationships), 친사회성 (prosocial behavior), 위축성 (withdrawal), 공격성 (aggression)

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This study investigated the moderating effect of negative emotionality on the association between teacherchild intimacy and peer interaction based on a differential susceptibility model. The participants were 252 threeyear-old children recruited from a day care center and preschool located in Incheon and Gyeonggi province. The teacher-child relationship was measured on a Student-Teacher Relationship Scale. This measure is a type of teacher's report with ratings based on a teacher's daily observations. This scale is composed of closeness items on the degree of warmth and open communication in teacher-child relationships. Peer interactions were measured with a Penn Interactive Peer Play Scale. This measure is composed of play interaction items, play disruption items and play disconnection. Negative emotionality was measured with Child Behavior Questionnaire. Teachers measured teacher-child intimacy and peer interaction scales. Parents reported children's negative emotionality. The research showed that negative emotionality moderated the association of teacher-child intimacy, play interaction, play isolation and play disruption. The magnitude of association between teacher-child intimacy and play disconnection as well as play interaction was greater for high levels of negative emotionality. Teacherchild intimacy was significantly associated with play disruption only for high levels of negative emotionality. The findings of this study support a differential susceptibility model.

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