Intervention
To enter the intervention, adolescents go to the intervention
website and create an account. In the account
they select their school, which will lead them into the
correct routing for the control or experimental condition.
The intervention consists of five sessions. A baseline
questionnaire followed by three different game scenarios
(i.e., sessions 1–3), a fourth session in which adolescents
can accept a challenge to drink less at an upcoming drink
event and finally a session to evaluate the challenge
(Figure 1). The control condition fills in the baseline
questionnaire only, while the experimental condition
continues with the first game scenario.