evaluation

No Significant Effects from Exposure to Federal Antidrug Media Campaign

"Westat's analysis of the relationship between exposure to campaign advertisements and youth self-reported drug use in the NSPY [National Survey of Parents and Youth] data for the entire period covered by its evaluation -- assessments that used statistical methods to adjust for individual differences and control for other factors that could explain changes in self-reported drug use -- showed no significant effects of exposure to the campaign on initiation of marijuana by prior nonusing youth.