Worried that your children aren’t getting enough sleep? You’re not alone. As one prominent educational psychologist put it, “physicians and writers on school hygiene agree that children are likely to receive less sleep than is needful to them.”
That assessment was offered way back in 1913, and it came from Lewis Terman, who went on to develop the Stanford-Binet IQ test. Terman certainly wasn’t right about everything, but his concern for sleep-deprived kids tapped into a longstanding source of parental angst.
It turns out that experts have been fretting about tired children since at least 1897. According to an article published online Monday by the journal Pediatrics, 32 sets of sleep guidelines for kids – containing 360 distinct recommendations for children of specific ages – were published between 1897 and 2009. During that time, the amount of recommended sleep fell by an average of 0.71 minutes per year. That added up to about 70 fewer minutes of suggested nightly sleep over the course of the 20th century.