Could a Five-Lesson school program curb juvenile delinquency?
NCT ID NCT07147738
First seen Jul 14, 2026 · Last updated Jul 15, 2026 · Updated 1 time
Summary
This trial investigates whether a Dutch school-based program called Incredibly Strong (Kapot Sterk) can improve social-emotional skills and prevent juvenile delinquency in children aged 10 to 13. The program includes five lessons with role-playing, group discussions, and reflection exercises led by trained youth workers. Researchers will measure changes in self-esteem, self-control, peer pressure, and externalizing behavior to see if the program works.
What this could mean
Our plain-language read of the trial. This is informational only, not medical advice or a prediction.
- Active substance
- a school-based behavioral prevention program called Incredibly Strong (Kapot Sterk) consisting of five lessons with role-playing, group discussions, and reflection exercises
- What this could lead to
- If effective, this program could provide schools with a simple, evidence-based tool to reduce future delinquency and improve children's self-esteem and self-control.
- What could go wrong
- This is a relatively small trial in one country, and the program's effects may not generalize to other settings or cultures. The outcomes rely on self-reported measures, which may not fully capture real-world behavior.
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Study facts
What this study's own registry entry says, in plain language.
- Phase
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Not a phased trial
Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.
- Participants
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286 people
The number who actually took part.
- Started
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Nov 2024
- Finished
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Sep 2025
- Lead sponsor
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Other sponsor
The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
- Ages
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10 to 13 years
- Sex
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Anyone
- Healthy volunteers
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Not accepted
This study is not open to healthy volunteers. The entry requirements below say who it is open to.
Show the full entry requirements Hide the full entry requirements
Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
Inclusion Criteria: Every pupil who meets the inclusion criteria for the intervention program can participate in the study. The program is for pupils in their last or second-to-last year of elementary school. * Participants are 10-13 years old. * Participants attend school. Exclusion Criteria: \- Participants are younger than 10 years old or older than 13 years old.
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As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
Contacts and locations
Locations
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Utrecht University
Utrecht, Utrecht, 3584 CS, Netherlands