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Anti-Bullying app shows promise in school trial

NCT ID NCT05572398

Knowledge-focused Sponsor: Klein Buendel, Inc. Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed This study
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 27, 2026 · Last updated Jun 27, 2026

Summary

This study tested a mobile web app version of the STAC bullying intervention in 613 middle school students across four states. The app teaches students techniques to intervene when they see bullying. Researchers measured students' knowledge, confidence, and how often they used the strategies, as well as bullying victimization rates.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

Active substance
STAC-T mobile web app (behavioral intervention)
What this could lead to
If successful, this could provide a low-cost, scalable way to reduce bullying in schools.
What could go wrong
This is a completed feasibility and efficacy trial. Results may not generalize beyond the four states studied, and the app's impact on real-world bullying may be limited.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Phase

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

613 people

The number who actually took part.

Started

May 2022

Finished

Nov 2024

Lead sponsor

A company

The lead sponsor is a pharmaceutical, biotech, or medical-device company.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Ages

11 years and older

Sex

Anyone

Healthy volunteers

Accepted

You do not need to have the condition being studied to take part.

Show 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 for Students: * being enrolled in grades 6, 7, or 8 in a middle/junior high school in Idaho, Oregon, Mississippi, or New Hampshire. * being selected by school counselors and teachers for having a desire to make a positive difference at school, be mature, and have the ability to positively engage with peers and adults (Aims 1 and 2). * speaks and reads English or Spanish. * parent consents and student assents for participation. Exclusion Criteria for Students: * participated in a previous study on STAC. * speaks and reads only a language other than English or Spanish. * does not consent and/or assent for participation. Inclusion Criteria for School Personnel: * employed in a middle/junior high school in Idaho or Mississippi with grades 6, 7, or 8. * employed as a principal, teacher, or school counselor. * speaks and reads English or Spanish. * consents to participate. Exclusion Criteria for School Personnel: * participated in a previous study on STAC. * speaks and reads only a language other than English or Spanish. * does not consent for participation.

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Conditions

The condition(s) this trial relates to.

Bullying Psychological Well-Being

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Adolescent Bullying Mental health Technology

Contacts and locations

Locations

  • Boise State University

    Boise, Idaho, 83725-1135, United States

  • University of Mississippi

    University, Mississippi, 38677-1848, United States

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