A Cohort Study Examining Genetic and Environmental Factors on Infants and Its Effect on Social Behavior in Childhood

本研究旨在探讨幼儿行为、环境因素与后期社会行为的关系。研究结果如下：1。在从婴儿到儿童的发育过程中，在9个月左右有一个分界点。2. 据推测，这一分界点与从生物机制向社会机制（如与环境的相互作用）的转变有关。3. 与后期社会发展相关的生物学因素是身体特征，如头围和婴儿在母婴互动过程中的时间节奏。4. 分析幼儿社会行为问卷与小学入学后社会行为的相关性。5. 认知反射冲动与后期发育障碍有部分关系。

The purpose of the study is to investigate the relationship between infant behavior, environmental factors and later social behavior. The findings of the study were as follows:1. There is a dividing point at around 9 months of age during the developmental process from infant to childhood. 2. It is assumed that this dividing point is related to the transition from biological mechanism to social mechanism such as interaction with the environment. 3. Biological factors related to later social development are physical features such as head circumference and infant's temporal rhythms during mother-infant interaction. 4. Correlation between questionnaires for infant and social behaviors after enrollment in elementary school were being analyzed. 5. Cognitive reflection-impulsiveness is partly related to later developmental disorder.