“…24 PRIMARY DATA ANALYSIS Quantitative Analysis Each resident's performance was recorded with a ceilingmounted system (Kb Port, Allison Park, PA) and was then scored by an external blinded expert reviewer with no knowledge of the trainees, their training level, or the purpose of the study. The blinded external rater used an entrustment-based 25 scoring tool, termed the Resuscitation Assessment Tool 26 (Appendix E3, available online at http://www.annemergmed.com), which was developed as a modification of the previously derived Queen's Simulation Assessment Tool, which has validity evidence in a similar context. Strictly speaking, the Resuscitation Assessment Tool itself has not been directly validated, but it was deemed to be more contextually appropriate, given its widespread use in resuscitation assessment in the emergency medicine residency program at our institution.…”