Summary of all penalties in control and experimental groups before and after intervention. Penalties are recorded as mean (SEM) number of penalties per group per 1000 player hours
| Control (mean penalties per 1000 player hours (SEM)) | Experimental (mean penalties per 1000 player hours (SEM)) | |||
|---|---|---|---|---|
| Before survey | After survey | Before video | After video | |
| *p<0.05, Student’s t test, comparing before/after results in each group. | ||||
| Roughing | 107.5 (2.5) | 102.3 (11.4) | 89.4 (36.3) | 98.4 (22.3) |
| Tripping | 62.5 (2.5) | 62.5 (17,0) | 66.6 (22.0) | 26.1 (10.8) |
| Interference | 50 (5.0)* | 28.4 (5.7)* | 53.9 (14.5) | 48.4 (17.2) |
| Slashing | 32.5 (22.5) | 39.7 (5.7) | 44.8 (20.4) | 35.9 (5.3) |
| Elbowing | 27.5 (2.5) | 22.7 (11.4) | 26.9 (7.2) | 17.7 (2.6) |
| Checking from behind | 22.5 (12.5) | 34.1 (0.0) | 38.4 (3.7)* | 7.6 (0.69)* |
| Other | 17.5 (2.5) | 22.7 (22.7) | 17.6 (14.1) | 8.9 (8.9) |
| High sticking | 15.0 (0) | 11.4 (11.4) | 24. (13.7) | 19.3 (10.4) |
| Holding | 12.5 (2.5)* | 22.7 (0.0)* | 12.5 (2.8) | 18.7 (9.4) |
| Hooking | 10 (5.0) | 11.4 (0.0) | 27.8 (3.1) | 23.1 (5.0) |
| Charging | 5.0 (0.0) | 5.7 (5.7) | 10.9 (2.4) | 4.9 (4.9) |
| Cross checking | 5.0 (5.0) | 11.0 (11.4) | 23.7 (1.3)* | 13.0 (3.4)* |
| Unsportsmanlike conduct | 2.5 (2.5) | 0.0 (0.0) | 9.8 (6.8) | 4.9 (4.9) |
| Boarding | 2.5 (0.0) | 11.4 (0.0) | 10.6 (1.7) | 7.1 (4.3) |
| Fighting | 0.0 (0.0) | 0.0 (0.0) | 0.0 (0.0) | 0.0 (0.0) |
| Spearing | 0.0 (0.0) | 0.0 (0.0) | 0.0 (0.0) | 0.0 (0.0) |