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Knot-tying metrics (N=45).
| Scores by group | Prerotation, mean (SD) | Postrotation, mean (SD) | P value | |
| Nonvideo group | ||||
| Standard checklist | 9.7 (3.8) | 12.5 (3.1) | .001 | |
| Anchored scale | 10.5 (3.7) | 15.9 (2.9) | <.001 | |
| Total score | 20.3 (7.1) | 28.4 (5.4) | <.001 | |
| Video group | ||||
| Standard checklist | 9.0 (4.9) | 12.9 (0.7) | .002 | |
| Anchored scale | 11.5 (4.8) | 15.8 (3.7) | .002 | |
| Total score | 20.2 (9.2) | 28.7 (6.5) | .001 | |
