“…It is generally reflected by intrinsic motives including self-efficacy, altruism, a sense of belonging to community, and fun, as well as extrinsic motives including to earn rewards, to develop skills, to improve career prospect, to gain recognition (Acar 2019;Alam and Campbell 2017;Battistella and Nonino 2013;Leimeister et al 2009). In addition, solvers' characteristics about demographics such as age, gender and employment (Bagheri et al 2020), participation experience and past success experience (Bayus 2013; Khasraghi and Aghaie 2014), domain knowledge (Frey, Lüthje, and Haag 2011;Mack and Landau 2020;Zhu, Li, and Andrews 2017), and cultural background (Chua, Roth, and Lemoine 2015;Bockstedt, Druehl, and Mishra 2015) have been argued as important factors that affect their behaviours.…”