This study assessed an in-school program aimed at preventing or reducing dr
ug use and other deviant behavior in a sample of 167 at-risk youth in their
transition years. Over 10 weeks, 17 one-hour sessions were offered to yout
h who were identified using a self-report questionnaire (at 9 schools with
12 control sites in Ontario, Canada). Repeated measures analysis of covaria
nce was used to assess program impact at posttest and six-month followup. P
rogram participants, compared with the control group, reported less frequen
t drinking, cannabis use, nonprescribed tranquilizer or sedative use, and s
elf-reported theft, and improved attitudes toward school (posttest only). T
hey also reported less supportive attitudes toward alcohol, tobacco, and ca
nnabis use, and less risky drinking behavior (posttest and follow-up). Ther
e were no program effects for ally of the personal and social competence or
life skills measures (e.g., self-esteem, social skills).