Manipulating sleep duration alters emotional functioning and cognitive performance in children.

Objective: To examine the impact of sleep duration on emotional functioning and cognitive performance in children.

Methods: 32 children (8-12 years) wore actigraphs for 3 weeks. Following a week of typical sleep, each child was randomly assigned to go to bed 1 hr earlier for 4 nights (Long Sleep) or 1 hr later for 4 nights (Short Sleep) relative to their typical bedtime.