Table 1.
Summary characteristics of included studies
| Characteristics | Summary statistic |
|---|---|
|
Studies (effect sizes) Participants (M, SD) |
50 (320) 45,371 (1600, 4624) |
| Publication status | |
| Published | 38 (76%) |
| Unpublished | 12 (24%) |
| Funding | |
| Funded | 27 (54%) |
| Not funded | 23 (46%) |
| Program target | |
| Cyberbullying | 38 (76%) |
| Not cyberbullying | 12 (24%) |
| Design | |
| NR-Cls | 5 (10%) |
| NR-Ind | 7 (14%) |
| NR-Scl | 11 (22%) |
| R-Cls | 10 (20%) |
| R-Scl | 11 (22%) |
| R-Ind | 6 (12%) |
| WWC rating | |
| MSWoR | 9 (18%) |
| MSWR | 19 (38%) |
| DNMS | 22 (44%) |
| Location | |
| USA | 18 (36%) |
| Non-USA | 32 (64%) |
| SES | |
| Low | 11 (22%) |
| Low-middle | 9 (18%) |
| Middle | 12 (24%) |
| High-middle | 13 (26%) |
| High | 5 (10%) |
| Mean percentage male | 51% |
| Mean percentage nonwhite | 35% |
| Mean age in years (SD) | 13 (1.73) |
| Mean length of intervention in weeks (SD) | 22 (25.5) |
Study-level summary statistics presented
NR-Cls non-random assignment at the classroom level, NR-Ind non-random assignment at the individual level, NR-Sclnon-random assignment at the school level, R-Cls random assignment at the classroom level, R-Ind random assignment at the individual level, MSWoR meets WWC standards without reservation, MSWR meets standards with reservation, DNMS does not meet WWC standards