“…Participation measures and factors have been investigated in order to verify the role of financial incentives in participation (Deci;Koestner and Ryan, 1999), to notice the aims and needs of users (Kim, 2000), the reasons which lead members to participate (Hemmetsberger and Pieters, 2001), the feeling of recognition by individuals (Chan et al, 2004), the theory of gratification and use (Sangwan, 2005), the influence of posts and visualizations of the content (Koh et al, 2007), the effectiveness of web services (Welch and Pandey, 2007), the measure of interactivity among members (Adiele and Ehikioya, 2007) and the need, identification and confidence of participant members (Han;Zheng and Xu, 2007).…”