Mindfulness-Based Substance Use Prevention (MINDS-UP)

Percent of participants who completed all study procedures among those who were randomized

Percent of scheduled sessions that were completed by the participant.

Research Assessment Package for Schools - Teacher Rated

Research Assessment Package for Schools - Student Engagement

Percentage of assigned homeworks that were completed by the participant.

Acceptability of Intervention Measure

Pre-assessment to post-assessment (and 6- and 12-month follow-up) difference in the total score on the total problems subscale on the Child Behavior Checklist (CBCL), which is comprised of 98 questions; individual item scores range from 0 to 2; higher scores indicate higher amount of behavioral problems

Pre-assessment to post-assessment (and 6- and 12-month follow-up) difference in score on the ADHD Rating Scale, an 18-item parent-report assessment that measures adolescent behaviors related to ADHD (inattentiveness, hyperactivity).

The C-SSRS is a gold-standard assessment tool for suicide risk. This tool will be administered at every visit.

Low-level and early alcohol use as characterized by the iSay Sipping Inventory. This survey characterizes low level and first/early alcohol use, including age at first sip, whether that drink was completed, and behaviors after the first sip.

Tobacco use as measured by Tobacco Low Level Use Measure. This is a short tool that measures number of times used, type of tobacco/nicotine used, duration of use, and frequency of use.

Cannabis use as measured by the Marijuana Low-Level Use Measure, a short tool that measures early/first use of cannabis.

The Youth Self Report (YSR) is the self-report adolescent version of the Child Behavior Checklist, and is used to assess emotional and behavioral problems in children and adolescents.

Pre-assessment to post-assessment (and 6- and 12-month follow-up) difference in score on the Child and Adolescent Mindfulness Measure (CAMM); the CAMM is a 10-item measure of self-reported mindfulness; scores range from 0 to 40, with higher scores indicating higher mindfulness

Pre-assessment to post-assessment (and 6 and 12 month-follow-up) difference in score on the Revised Childhood Anxiety and Depression scale, a 47-item self-report scale that assesses childhood/adolescent anxiety and depression symptoms across six sub-domains.

The Perceived Tolerance of Use is a tool that assesses peer tolerance of use of substance use (of substances that a participant has heard of, meaning the number of items is variable). It is a tool that is used in the ABCD study and the Monitoring the Future Study, the two most comprehensive studies of adolescent substance use.

The Perceived Harm of Substance Use tool assesses perceived harm of substance use (of substances that a participant has heard of, meaning the number of items is variable). It is used in the ABCD study and the Monitoring the Future Study, the two most comprehensive studies of adolescent substance use.

The Brief Comprehensive Effects of Alcohol Questionnaire is a 15-item self-report version of the Comprehensive Effects of Alcohol Questionnaire that is used by the ABCD study to assess an adolescent's expectations of using alcohol.

The Adolescent Smoking Consequences Questionnaire (ASCQ) is a 30-item self-report instrument used to assess outcome expectancies of cigarette smoking among adolescents.

Brief -Marijuana Effect Expectancies Questionnaire (MEEQ-B) is a 6-item self-report assessment of an adolescent's expected effect of marijuana.

The Community Risk and Protective Factors Survey is a 24-item parent-report tool to assess adolescent's experience of exposure to substance use risk and protective factors in the community.