The Effect of Video Playback Speed on Surgeon Technical Skill Perception
Jason D Kelly, Ashley Petersen, Thomas S Lendvay, Timothy M Kowalewski

TL;DR
This study investigates how increasing video playback speed affects perceived surgical skill, finding that faster speeds disproportionately enhance perceived expertise, especially for experts, aiding skill discrimination.
Contribution
The paper demonstrates that increasing playback speed can improve the discrimination of surgeon skill levels by highlighting differences in perceived expertise.
Findings
Perceived skill increases with playback speed for both novices and experts.
Experts show a significantly greater increase in perceived skill with faster playback.
Faster playback speeds can help distinguish between novice and expert performances more effectively.
Abstract
Purpose: Finding effective methods of discriminating surgeon technical skill is a complex problem to solve computationally. Previous research has shown non-expert crowd evaluations of surgical performances are as accurate as the gold standard, expert surgeon review. The aim of this research is to learn whether crowdsourced evaluators give higher ratings of technical skill to video of performances with increased playback speed, the use in discriminating skill levels, and if this increase is related to the evaluator consciously being aware that the video is being manually edited. Methods: A set of ten peg transfer videos (5 novices, 5 experts), were used to evaluate the perceived skill of the performers at each video playback speed used (0.4x-3.6x). Objective metrics used for measuring technical skill were also computed for comparison by manipulating the corresponding kinematic data of…
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