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In the article "Efficacy of Methylphenidate for Attention-Deficit Hyperactivity Disorder in Children With Tic Disorder," which appeared in the June 1995 issue of the Archives, there was a typographical error in one of the F values. On page 452, the decimal point in the last F value provided in the "Parent Ratings" section was erroneously typeset as a hyphen. The sentence should have read, "A linear function provided a good fit to the data (F[1,29]=10.66, P=.003)." The Archives apologizes for its error.
Correction. Arch Gen Psychiatry. 1995;52(10):836. doi:10.1001/archpsyc.1995.03950220046009
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