and group-home settings, and is administered in classrooms
during school hours.
Passive parental consent and active student assent were
secured for the surveys. In 1992, 99% of Minnesota school
districts participated, and in 1998, 92% did. On the basis
of enrollment records, the Department of Education
estimated that 75% of ninth- and 12th-grade Minnesota
public school students participated in 1992 and 1998.
Detailed demographic information on the overall samples
is reported elsewhere.