BACKGROUND: Developing data-based interventions to address drug use prevention among schoolchildren is critically important because research has consistently demonstrated that adolescence is the main period for experimenting with alcohol and other drugs. AIMS: To explore the changes in 30-day prevalence rates of alcohol consumption (AC) in schoolchildren and to look into the (in-)direct effect of the Unplugged programme as one of the independent variables of an equation that contained the strongest psychosocial predictors of AC at four follow-ups, as well as to examine the moderating effect of gender. DESIGN AND MEASUREMENTS: The study was carried out as a cluster randomized controlled trial with five measurement points (before the implementation of the programmeT1, immediately after the implementationT2and then three monthsT3, 12 monthsT4, and 18 monthsT5after the implementation). SAMPLE: The sample included 1283 schoolchildren (M = 11.52; 46.8% of them boys) from 63 schools. RESULTS: The impact of Unplugged on AC was moderated by a baseline measure of AC at T4 and T5 and a partial indirect effect of Unplugged on AC through descriptive normative belief change was found at T4 among the girls. CONCLUSIONS: The findings obtained generally emphasize the need to make provisions for a baseline AC and gender that can modify the effects of interventions.

Pavol Jozef Šafárik University Faculty of Arts Department of Educational Psychology and Psychology of Health Košice Slovak Republic

Pavol Jozef Šafárik University Faculty of Arts Department of Psychology Košice Slovak Republic

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