Table 2.

Rationale for Selecting Attempt #4^*† for Calculation of Proficiency Scores: Attempts and Variables

The Change Between Attempts	Was Largest for This Many Variables (out of 204)
#1-#2	100
#2-#3	73
#3-#4	10
#4-#5	03

^*We present Attempt #2 data from the LapMentor tasks because less data were available for these tasks.

^†Because the number of surgeons present for Attempt #3 was on average about 2.1 higher than the number present for Attempt #4, the accompanying website presents data for both Attempts #3 and #4.