11 and older, any sex, with Adolescent or Bullying. Patients with the condition only — healthy volunteers not accepted.
Results — posted to ClinicalTrials.gov
Per-arm endpoint measurements with 95% confidence intervals where reported. Source: trial results section.
Student-Advocates Pre- and Post-Scale (SAPPS)Primary· Baseline assessment, 30-day assessment
An 11 item questionnaire measuring students' knowledge of buying, knowledge of the STAC-T strategies, and students' confidence to intervene in bullying situations. Items are rated on a 4-point Likert Scale ranging from 1 (Totally Disagree) to 4 (Totally Agree) and were summed to compute a total scale score. The minimum value is 11 and the maximum value is 44, and a higher score means a better outcome.
Baseline
Group
Value
95% CI
STAC-T
29.29
± 4.39
Control
29.70
± 4.53
30-Day
Group
Value
95% CI
STAC-T
34.19
± 6.32
Control
32.12
± 5.64
Bullying and Cyberbullying Scale for Adolescents (BCS-A) - Victimization Scale at 30 DaysPrimary· Baseline assessment, 30-day assessment
This questionnaire measures bullying and cyberbullying victimization in the past 30 days. The 13-item Victimization Scale assesses in-person bullying victimization with 8 items and cyberbullying victimization with 5 items. Items are rated on a 5-point Likert Scale ranging from 0 (Never) to 4 (Four or More Times) and were summed to compute a total scale score. The minimum value is 0 and the maximum value is 52, and a higher score means a worse outcome.
Baseline
Group
Value
95% CI
STAC-T
8.52
± 10.56
Control
8.30
± 10.6
30-Day
Group
Value
95% CI
STAC-T
7.81
± 10.61
Control
8.66
± 10.71
Use of Strategies at 30 Days Post-interventionPrimary· 30-day assessment
Questions rating the student's use of each STAC-T strategy using a single item rated on a 5-point Likert scale: "How often would you say you have used these strategies to stop bullying in the past month?" (a) Stealing the Show; (b) Turning it Over; (c) Accompanying Others; and (d) Coaching Compassion. Total strategies reflects the number of students who used at least one of the four STAC-T strategies. Results are reported for students who reported witnessing bullying in the past 30-days (n=125/229).
Stealing the Show
Group
Value
95% CI
STAC-T
73
STAC-T
52
Turning it Over
Group
Value
95% CI
STAC-T
86
STAC-T
39
Accompanying Others
Group
Value
95% CI
STAC-T
97
STAC-T
28
Coaching Compassion
Group
Value
95% CI
STAC-T
73
STAC-T
52
Total Strategies
Group
Value
95% CI
STAC-T
111
STAC-T
14
Sponsor's own description
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.
Publications & conference data
2 peer-reviewed publications reference this trial (live from Europe PMC):
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Publications: Europe PMC API search by NCT ID, retrieved 9 June 2026
Drug + disease cross-links: matched in real time against Drug Landscape's normalised drug + company + condition tables
Sponsor: as reported to ClinicalTrials.gov by Klein Buendel, Inc.
Last refreshed: 24 February 2026
Drug Landscape aggregates and links these public records for informational use only. Always verify against the primary source before clinical or regulatory decisions. Canonical URL: https://druglandscape.com/trial/NCT05572398.