Methodology for the Observation of Hidden Behaviours in Addiction

Casimiro Balsa is Full Professor Emeritus of the NOVA University of Lisbon’s School of Social Sciences and Humanities (NOVA FCSH), Portugal, and a researcher at the Interdisciplinary Centre of Social Sciences, NOVA University of Lisbon, Portugal. He is the coordinator, for Portugal, of the General Population Survey on Drugs, and expert contributor to the European Monitoring Centre for Drugs and Drug Addiction. Cláudia Urbano earned a PhD in sociology from the Faculty of Social and Human Sciences of NOVA University of Lisbon, Portugal, and a postgraduate degree in data analysis. She is an integrated researcher at the Interdisciplinary Centre of Social Sciences, Visiting Assistant Professor at NOVA University of Lisbon, Portugal, and a researcher for the Portuguese General Population Survey on Drug Use and Abuse. Clara Vital earned a master’s in sociology, specifically focussing on public policy and social inequalities, at the College of Social and Human Sciences, NOVA University of Lisbon, Portugal. She is a research fellow at the same institution, where she has undertaken several projects on psychoactive substances.