[Effects of sleep deprivation on the intelligence structure of school-age children in Changsha, China].

Objective: To investigate the effects of sleep deprivation on intelligence development in primary school students.

Methods: Between June 2009 and April 2010, 316 grade 5 students aged 10-11 years were selected from four primary schools in four administrative districts of Changsha, China by stratified random sampling. The intelligence characteristics of children with varying degrees of sleep deprivation were investigated using the Chinese Wechsler Intelligence Scale for Children.

[Quantified research about the effects of sleep quality on attention in class and acadamic achievements in primary school children].

Objective: To study the adverse effects of sleep problems and sleep insufficiency on attention in class and pupils' acadamic achievements.

Methods: A total of 1138 students from four primary schools at ages of 6-12 years were randomly sampled from four districts of Changsha city, Hunan Province June 2009 to April 2010. The inquired items included sleep problems, sleep time, sleep quality, attention in class and academic achievements.