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Background: Men who have sex with men (MSM) bear a high burden of syphilis infection. Expanding syphilis testing to improve timely diagnosis and treatment is critical to improve syphilis control. However, syphilis testing rates remain low among MSM, particularly in low- and middle-income countries. We describe the protocol for a randomised controlled trial (RCT) to assess whether provision of syphilis self-testing services can increase the uptake of syphilis testing among MSM in China.Methods: Four hundred forty-four high-risk MSM will be recruited online and randomized in a 1:1:1 ratio to (1) standard syphilis self-testing arm; (2) a self-testing arm program enhanced with crowdsourcing and a lottery-based incentive, and (3) a standard of care (control). Self-testing services include a free syphilis self-test kit through the mail at monthly intervals. Participants in the lottery incentive arm will additionally receive health promotion materials generated from an open crowdsourcing contest and be given a lottery draw with a 10% chance to win 100 RMB (approximately 15 US Dollars) upon confirmed completion of syphilis testing. Syphilis self-test kits have step-by-step instructions and an instructional video. This is a non-blinded, open-label, parallel RCT. Participants in each arm will be followed-up at three and 6 months through WeChat (a social media app like Facebook messenger). Confirmation of syphilis self-test use will be determined by requiring participants to submit a photo of the used test kit to study staff via secure data messaging. Both self-testing and facility-based testing will be ascertained by sending a secure photographic image of the completed kit through an existing digital platform. The primary outcome is the proportion of participants who tested for syphilis in the past 3 months.Discussion: Findings from this study will provide much needed insight on the impact of syphilis self-testing on promoting routine syphilis screening among MSM. The findings will also contribute to our understanding of the safety, effectiveness and acceptability of syphilis self-testing. These findings will have important implications for self-testing policy, both in China and internationally.Trial Registration: ChiCTR1900022409 (10 April, 2019). [ABSTRACT FROM AUTHOR]

Massive Open Online Courses (MOOCs) have become increasingly common in recent years. As the main component of MOOCs, instructional videos play a significant role in students' learning. This study builds on the extant research on multimedia learning by testing the impact of teachers' continuous vs. intermittent presence in procedural knowledge instructional videos. Students' outcomes were assessed in terms of achievement, learning satisfaction, social presence, and cognitive load. Using a quasi-experimental design, 120 Chinese undergraduate students from four undergraduate classes, were randomly assigned to one of two video conditions based on whether the instructor had a continuous or intermittent presence in an instructional video teaching procedural knowledge. A series of independent sample t tests revealed that a teacher's intermittent presentational approach improved learning achievement and satisfaction, and created less cognitive load relative to a continuous presentational approach. Results of this study can contribute to the design of procedural knowledge instructional videos. [ABSTRACT FROM AUTHOR]