European School Survey Project on Alcohol and Other Drugs - Validity Study 2013

The 2013 Validity study of the European School Survey Project on Alcohol and Other Drugs (ESPAD) was the second such study conducted in the series. The purpose of this study was to collect data on adolescent drug use and to investigate the perceptions of these questions in order to compare them across participating countries. Four countries were involved in the data collection, and 1,138 students in 52 classes from 38 different schools participated in the study.

The data collection method consisted of a self-completed classroom questionnaire followed by an in-person interview. The questionnaire included ESPAD core questions and new questions tested in this round. The interview collected information on the students perceptions of the survey questions. This included perceptions on the difficulty of answering the questions, whether key variable questions were understood, and how honestly the questions were answered.