What curious creatures! On the IQ scale, whose mean value is 100 points, girls who had had regular bedtimes scored between eight and nine points more than those who did not. Boys were not completely unaffected. Irregular bedtimes left their IQs about six points below those of their contemporaries at the age of three. But the distinction vanished by the time they were seven. [via The Economist] Yvonne Kelly, John Kelly, Amanda Sacker; "Time for bed: associations with cognitive performance in 7-year-old children: a longitudinal population-based study"; In Journal of Epidemiology & Community Health; doi:10.1136/jech-2012-202024; 2013-07-08; 6 pages. jech.bmj/content/early/2013/07/11/jech-2012-202024 Table 1 in the paper gives scores for reading, maths (math), and spatial (pattern matching of blocks) against declared bedtimes prior to 7:30 through beyond 9:30. Mmm... "knock on effects" and "markers of the family milieu."
Posted on: Sun, 14 Jul 2013 05:47:31 +0000
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