This document summarizes a presentation on the EFFEKT program for preventing underage alcohol use through engaging parents. The program is shown to:
1) Maintain parents' restrictive attitudes towards underage drinking through brief presentations at parent-teacher conferences focusing on the influence of parental attitudes.
2) Decrease rates of underage drunkenness and antisocial behaviors up to 3 years later, with effect sizes of 0.48 and 0.42 respectively.
3) Be particularly effective for "early starters" in reducing drunkenness (effect size of 0.72) and antisocial behaviors (effect size of 0.46).