@article{oai:tsukuba.repo.nii.ac.jp:00049352,
 author = {安梅, 勅江 and ANME, Tokie and Tomisaki, Etsuko and Tanaka, Emiko and Watanabe, Taeko and Shinohara, Ryoji and Hirano, Maki and Onda, Yoko and Mochizuki, Yukiko and Yato, Yuko and Yamakawa, Noriko},
 journal = {Child and Adolescent Psychiatry and Mental Health},
 month = {Dec},
 note = {Background
Many reports argue that sleep is important for children’s health, learning, and academic performance. The purpose of this longitudinal study was to examine the association between sleep and the development of social competence in infants.

Methods
This study was conducted as part of a Japan Science and Technology Agency (JST) project. Caregivers responded to the Japan Children’s Study Sleep Questionnaire when children were 18 months old. The interactions of caregivers and children were observed when children were 18, 30, and 42 months old, and rated with the Interaction Rating Scale, which is a measure of social competence.

Results
Nocturnal sleep duration of more than 10 h and an earlier bed time than 22:00 were significantly correlated with two trajectory groups (low point and high point transition groups) of children’s social competence at 18, 30, and 42 months. Further, total sleep duration of more than 12.25 h and an earlier bed time than 22:00 were significantly correlated with the trajectory of children’s social competence at 18, 30, and 42 months.

Conclusions
Sleep duration and sleep onset time are important factors in children’s development of social competence.},
 title = {The relationship between the development of social competence and sleep in infants: a longitudinal study},
 volume = {12},
 year = {2018},
 yomi = {アンメ, トキエ}
}