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Direct linkWhite, Victoria M.; Hill, David J.; Effendi, Yuksel – Evaluation Review, 2004
This study examines the impact of passive and active parental consent procedures on the type of adolescents participating in a school-based survey examining substance use. Schools recruited from a random sample of metropolitan schools were assigned to passive or active parental consent condition. Results showed that participation rates in active…
Descriptors: Incidence, Adolescents, Marijuana, Smoking
Peer reviewedDent, Clyde W.; Sussman, Steve Y.; Stacy, Alan W. – Evaluation Review, 1997
Differences between means, variance, and correlation parameter estimates from a full school sample and samples restricted by parental consent were studied with 1,609 students at continuation high schools and 1,192 at traditional high schools. Sample bias due to consent policies may not be a substantive problem, especially if a telephone consent…
Descriptors: Correlation, Drug Use, Estimation (Mathematics), High School Students
