of 72. TeamMonitor scores (Stocker et al.) were recorded by team members. Results In 63% of scenarios, participants gave themselves a higher m-CALM score than the observer. Observer scores did not correlate with seniority. TeamMonitor scores were averaged and converted to percentages. There was an increase of 11% from first to last scenario and a linear relationship between TeamMonitor scores and simulation course time in minutes (Spearman correlation 0.69). We acknowledge that scenario 8 was the participant's second simulation (table 2). Conclusions These results demonstrate differences between self-perceived and observed leadership. There does not appear to be a strong relationship between seniority and perceived leadership. The team's perception of performance improves as the course progresses suggesting the LIME course was impactful.