This study adds to the growing research on the use of BIs
for adolescents. Adolescents experiencing mild to moderate
drug abuse received either a two- or three-session schoolbased
intervention and were assessed for drug use outcomes
at 6-month follow-up. There are three major findings from
the study: (a) both active conditions showed significant
absolute and relative improvements across the range of
outcomes compared with the assessment-only group; (b) the
group that included a parent session (BI-AP) exhibited
greater and more consistent intervention effects compared
with the condition in which only the adolescent client
received services (BI-A); and (c) support for the mediating