N/A
N=613
Online Bullying Bystander Intervention for Middle Schools Phase II
Adolescent · Bullying · Technology · Mental Health
Bottom Line
View on ClinicalTrials.gov: NCT05572398 ↗Enrolled (actual)
613
Serious AEs
0.0%
Results posted
Feb 2026
Primary outcome: Primary: Student-Advocates Pre- and Post-Scale (SAPPS) — 29.29; 29.70; 34.19; 32.12 score on a scale
Study Design & Population
- Study type
- Interventional
- Phase
- N/A
- Interventions
- STAC-T (Behavioral)
- Age
- Pediatric, Adult, Older Adult · 11+ yrs
- Sex
- All
- Sponsor
- Klein Buendel, Inc.
- Primary completion
- Nov 2024
Outcome Measures
| Outcome | Result | p-value |
|---|---|---|
| PRIMARY Student-Advocates Pre- and Post-Scale (SAPPS) |
29.29; 29.70; 34.19; 32.12 | — |
| PRIMARY Bullying and Cyberbullying Scale for Adolescents (BCS-A) - Victimization Scale at 30 Days |
8.52; 8.30; 7.81; 8.66 | — |
| PRIMARY Use of Strategies at 30 Days Post-intervention |
73; 52; 86; 39; 97; 28 | — |
Summary
School interventions to reduce bullying can be effective but also require substantial time and resources. Online technologies have the potential to deliver effective bullying interventions to a large number of middle school students for less cost. The feasibility of delivering the effective STAC bullying intervention through a mobile web app will be tested using focus groups with middle school students and development and usability testing and the efficacy of the program will be tested using a randomized controlled trial.
Eligibility Criteria
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.
Data sourced from ClinicalTrials.gov (NCT05572398). Outcome figures and adverse-event rates are extracted automatically from the registry's posted results and are provided for clinician reference, not as a substitute for the primary publication.