Bullying
Overview
- Influence: Bullying
- Domain: Classroom
- Sub-Domain: Classroom influences
- Potential to Accelerate Student Achievement: Likely to have a negative impact
- Influence Definition: Bullying is an ongoing and deliberate misuse of power in relationships through repeated verbal, physical, and/or social behavior that intends to cause physical, social, and/or psychological harm. It can occur in person, online, by individuals, or by groups.
Evidence
- Number of meta-analyses: 4
- Number of studies: 70
- Number of students: 29,552
- Number of effects: 70
- Effect size: -0.33
Meta-Analyses
| Journal Title | Author | First Author's Country | Article Name | Year Published | Variable | Number of Studies | Number of Students | Number of Effects | Effect Size |
|---|---|---|---|---|---|---|---|---|---|
| Social Development | Nakamoto & Schwartz | USA | Is Peer Victimization Associated with Academic Achievement? A Meta-analytic Review | 2009 | Peer victimization on achievement | 33 | 29,552 | 33 | -0.24 |
| Psychological Bulletin | Kowalski, Giumetti, Schroader, & Lattanner | USA | Bullying in the digital age: A critical review and meta-analysis of cyberbullying research among youth | 2014 | Cyberbullying | 6 | 0 | 6 | -0.09 |
| Review of Educational Research | Gardella, Fisher, & Teurbe-Tolon | USA | A Systematic Review of Meta-Analysis of Cyber-Victimization and Educational Outcomes for Adolescents | 2018 | Cyber-bullying | 25 | 0 | 25 | -0.28 |
| World Journal of Psychiatry | Moore, Norman, Suetani, Thomas, Sly, & Scott | USA | Consequences of bullying victimization in childhood and adolescence: A systematic review and meta-analysis | 2017 | Bullying on achievement | 6 | 0 | 6 | -0.73 |
| TOTAL/AVERAGE | 70 | 29,552 | 70 | -0.33 | |||||
Confidence
The Confidence is the average of these four measures, each divided into five approximately equal groups and assigned a value from 1 to 5 based on the following criteria:
-
Number of Meta-analyses
- 1 = 1
- 2 = 2–3
- 3 = 4–6
- 4 = 7–9
- 5 = 10+
-
Number of Studies
- 1 = 1–10
- 2 = 11–50
- 3 = 51–200
- 4 = 201–400
- 5 = 400+
-
Number of Students
- 1 = 1–2,500
- 2 = 2,501–10,000
- 3 = 10,000–20,000
- 4 = 20,000–100,000
- 5 = 100,001+
-
Number of Effects
- 1 = 1–100
- 2 = 101–300
- 3 = 301–600
- 4 = 601–1,200
- 5 = 1,200+
| Number of Meta-Analyses | Number of Studies | Number of Students | Number of Effects | Overall Confidence | |
|---|---|---|---|---|---|
| Confidence Factor | 3 | 3 | 4 | 1 | 3 |