The intervention aims to decrease unhealthy behaviors such as excessive alcohol use and consumption of unhealthy snacks.
Conditions
Interventions
- In Charge school intervention (e.g., self-control, social norms, self-efficacy, attitudes)
- Control condition (Do not receive anything until the randomized controlled trial has ended)
Sponsors
University of Amsterdam
Trimbos Institute
Eligibility
Inclusion criteria
Inclusion criteria: Adolescents (16+) VMBO, MBO, HAVO, VWO students. MEC approval not needed as the study is nonmedical (no hospital or patients are involved).
Exclusion criteria
Exclusion criteria: No exclusion criteria.
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| We will measure the following variables: Behavior: Past and current behavior. Behavioral determinants: Intention, self-efficacy (non-use and refusal), social norms (injunctive and descriptive), attitudes (cognitive and affective), likelihood and evaluation of behavioral (dis)advantages. Interpersonal communication with several discussion partners (parents, teacher, friends, and classmates): frequency of discussions, valence of discussions, topic of discussions. | — |
Secondary
| Measure | Time frame |
|---|---|
| Personality variables: perceived self-control, perceived ability to resist temptations. Student evaluation of teacher: Clarity, verbal immediacy, affinity, teaching style, emotional support, classroom organization, instructional support, attitude towards the teacher, adherence to intervention, and content relevance. Student evaluation of intervention: self-evaluation, state motivation, learning climate questionnare, and attitude towards the intervention, perceived relevance of the intervention. Demographic information: Gender, age, nationality, parents' nationality, type of education, home situation. In addition, we also plan to interview students and teachers about the intervention and their conversations with others about the intervention. | — |
Contacts
Public ContactMathijs Mesman
Outcome results
None listed