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ID
Source
Health condition
The intervention aims to decrease unhealthy behaviors such as excessive alcohol use and consumption of unhealthy snacks.
Sponsors and support
Trimbos Institute
Intervention
Outcome measures
Primary outcome
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 outcome
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.
Background summary
The Trimbos institute has developed a new school health intervention aimed at increasing self-control of older adolescents (16+) to resist unhealthy behaviors such as alcohol and unhealthy snacks.
Interpersonal communication has been shown to be an important factor in the context of mass mediated health interventions. It has been shown that interpersonal communication mediates or moderates the effects of such interventions. Also, studies showed that interpersonal communication generally has more effects than health intervention exposure.
In this randomized controlled trial, we investigate the effectiveness of the intervention as well as how the effects depend on interpesonal communication.
Study design
Measures will be administered three times. One week before the intervention, one week after the intervention, and 12 weeks after the intervention.
Intervention
- 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)
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
No exclusion criteria.
Design
Recruitment
Followed up by the following (possibly more current) registration
No registrations found.
Other (possibly less up-to-date) registrations in this register
No registrations found.
In other registers
| Register | ID |
|---|---|
| NTR-new | NL6654 |
| NTR-old | NTR6888 |
| Other | : 2017-PC-8244 |