Who is changing your question on a social Q&A website?

Effective moderation of online communities is an important, but challenging, topic in HCI. In this paper, we study people's co-editing behavior on one of the most popular social Q&A websites in China, called Zhihu.com. We examined question logs to understand who/when/how a question is edited differently by multiple users; we also conducted semi-structured interviews with users who edited others' questions on Zhihu to understand their motivations and their perceptions of co-editing behavior, as well as their concerns and suggestions for future website designs for moderating such behavior. Our findings reveal that although co-editing questions is perceived as a positive and effective approach for improving questions' answerability and shaping norms in the online community, effective moderation mechanisms need to be designed to improve transparency and communication about co-editing behavior and to address possible tensions as a result of co-editing wars.