After a set of 22 questions designed to assess baseline knowledge, the control group was shown the guidelines before answering a set of 14 post-intervention questions. They were informed they would be presented with both an e-learning module and an abridged version of the current regional prehospital COVID-19 guidelines, albeit not in which order. Student paramedics from three Swiss schools were invited to participate. This was a web-based, randomized 1:1, parallel-group, triple-blind controlled trial. Our aim was to evaluate the impact of a gamified e-learning module on adequacy of PPE in student paramedics. Prehospital professionals such as emergency physicians or paramedics must be able to choose and adequately don and doff personal protective equipment (PPE) in order to avoid COVID-19 infection. These results have implications for improving user engagement for online user-generated video streaming platforms. The findings indicate that: (1) prior experience has a positive effect on creators' performance (2) specialized experience across distinct video categories has a nonlinear effect on creators' performance. We use a dataset from NetEase Cloud Music, one of the most popular music streaming platforms in China, with 21,549 content creators and 252,762 user-generated videos. Furthermore, we examine the role of specialization in learning. In this study, we empirically test the effect of prior experience on content creators' performance. As opposed to homogeneous production scenarios (e.g., assembling automobiles in a factory), creating user-generated videos is a more complex task in which learning might happen.

The success of these platforms relies on content creators who can effectively enhance user engagement (e.g., subscribing to a content creator's channel). With the development of high-speed internet and better mobile connections, online streaming platforms with user-generated videos are becoming popular.

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