Bedtime and Behavior
According to a study conducted at the University College London, irregular bedtimes may lead to behavioral problems in children. Researchers analyzed bedtime and behavioral data from 10,000 children in England, collected when the children were ages three, five, and seven years old. They found a clinically and statistically significant link between bedtimes and behavior, noting that irregular bedtimes affected children's behavior by disrupting circadian rhythms leading to sleep deprivation that is thought to affect the developing brain. As the children who did not have regular bedtimes progressed throough childhood, they scored increasingly worse on tests of hyperactivity, conduct problems, problems with peers, and demonstrated significantly more emotional difficulties. Children who switched to more regular bedtimes showed clear improvements in behavior.
Source: Journal of Pediatrics, November 2013