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Chen, Xinguang; Ren, Yuanjing; Lin, Feng; MacDonell, Karen; Jiang, Yifan – Evaluation and Program Planning, 2012
Smoking remains prevalent among US youth despite decades of antismoking efforts. Effects from exposure to prevention programs at national level may provide informative and compelling data supporting better planning and strategy for tobacco control. A national representative sample of youth 12-17 years of age from the National Survey on Drug Use…
Descriptors: Intervention, Smoking, Prevention, Drug Use
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Sarkin, Andrew J.; Tally, Steven R.; Cronan, Terry A.; Matt, Georg E.; Lyons, Heather W. – Evaluation and Program Planning, 1997
A strategy proposed by T. Cook and D. Campbell (1979) was used to investigate attrition in a community-based literacy program, focusing on 287 Head Start families. Data revealed interactions among intervention program-centered characteristics and person-centered characteristics that have implications for study validity and generalizability.…
Descriptors: Attrition (Research Studies), Community Programs, Dropouts, Generalization