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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 =[...]
Article : Périodique
Study objective: To examine the potential biases introduced when students in low response rate schools are dropped from classroom based surveys of adolescent risk taking behaviour. Design: Self administered confidential surveys were conducted in[...]
