GUTTMACHER S. ;
B. C. WEITZMAN ;
F. KAPADIA ;
WEINBERG S. L.
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2002
Dans American Journal of Public Health (Vol.92 n°2, 2002) Article : Périodique
Dans American Journal of Public Health (Vol.92 n°2, 2002) Article : Périodique
ENGLISH :
Objectives. This investigation examined the effectiveness of intensive efforts to include frequently absent students in order to reduce bias in classroom-based studies. Methods. Grade 10 students in 13 New York City high schools (n =[...]
Historique