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Study ties day care, aggression

Pioneer Press
Star Tribune

A report from the largest and longest-running study of American child care has found that keeping a preschooler in a day-care center for a year or more slightly increased the likelihood that the child would become disruptive in class -- and that the effect persisted through the sixth grade. The numbers presented in the story follows as: Every year spent in such centers for at least 10 hours per week was associated with a 1 percent higher score on a standardized assessment of problem behaviors. Sort of a confusing way to show this number but it works for me.