Yes / Care Opinion is an online feedback platform supporting patients to author stories about their care. It is not known whether authors would be willing to be involved in improving care through research. The aims of this study were to explore the views and preferences of Care Opinion authors about joining an online research community and to pilot new research community functionality. Five hundred and nine Care Opinion authors were invited to take part in an online survey in June 2019. Survey items included questions about participants' willingness to take part in research and their preferences for supporting processes. Data were analysed descriptively. Authors were invited to consent to join a research community and were asked to participate in three pilot studies. One hundred and sixty-three people consented to take part in the survey (32%). Participants indicated they would like to know the time commitment to the project (146, 90%), details about the organization carrying out the research (124, 76%) and safeguarding information (124, 76%). Over half indicated that they did not know how to get involved in healthcare research (87, 53%). Subsequently, 667 authors were invited to join the research community, 183 (27%) accepted, and three studies were matched to their expressed preferences for project attributes or organization type. Many people who leave online feedback about their experiences of healthcare are also willing to join a research community via that platform. They have strong preferences for supporting University and NHS research. Eligibility and acceptance rates to join pilot research studies varied. Further work is needed to grow the research community, increase its diversity, and create relevant and varied opportunities to support research. Four members of the Safety In Numbers patient and public involvement and engagement (PPIE) group advised about survey development. / National Institute for Health and Care Research (NIHR) Yorkshire and Humber Patient Safety Translational Research Centre (NIHR Yorkshire and Humber PSTRC)

The essence of online group-buying is to lower the price by gathering orders However, the process is filled with uncertainty and risks, such as the number of joining members, the final price, the quality of products, and even the trustworthiness of the initiators. Generally speaking, consumers tend to reduce risks by searching more information. The more uncertainties there are, the more information seeking should be. Online feedback mechanism is often adopted as a strategy to lower risks and uncertainties. Both e-Bay and Yahoo provide such feedback mechanisms. In addition, the larger the number of accumulated orders is, the higher possibilities to lower the price and risk will be. Therefore, the purpose of this research is to explore how the online feedback mechanism and the number of accumulated orders impact consumers¡¦ perceived risk and trust in the initiator and furthermore, how the perceived risk and trust impact consumers¡¦ behavior in online group buying. The study shows that the content of the online feedback mechanism has significant impact on consumers¡¦ perceived financial risk, performance risk, total risk and the trust in initiator as well. The more negative the content is, the more risks the consumers perceive and the less trust in the initiators the consumers have. Furthermore, different contents will result in different kinds of risks perceived by consumers. With larger number of accumulated orders, consumers have more trust in initiators. Additionally, consumers have higher intentions to join group-buying when they perceive lower risk and more trust in initiators. Therefore, consumers¡¦ intentions to join group-buying have significant impact on their actual behavior.