There are two versions of the CRAFFT 2.1: a Clinician Interview and a Self-administered Questionnaire. Research has shown that adolescents report greater comfort and likelihood of honesty with self-administered questionnaires (electronic versions or on paper) compared to face-to-face interviews. The self-administered version is also more time-efficient to admin ister than an interview. Therefore, we recommend the use of the Self-administered Questionnaire whenever possible, under conditions that protect