“…Altmeyer et al, 2016;Brenner et al, 2014;Carlier et al, 2016;Deng et al, 2016;Dergousoff and Mandryk, 2015;Feyisetan et al, 2015;Itoko et al, 2014;Kobayashi et al, 2015;Kurita et al, 2016;Lessel et al, 2015;Mason et al, 2012;Riegler et al, 2015;Roengsamut et al, 2015;Rosani et al, 2015; Runge et al, 2015 15 Reporting location-based informationBowser et al, 2013; Brito et al, 2015; De Franga et al, 2015; Goncalves et al, 2014; Kawajiri et al, 2014; Y. Liu, Alexandrova, Nakajima et al, 2011*; Martella et al, 2015; Massung et al, 2013; Prandi et al, location tagging, reporting of location-based information, on-location experience, taking location-based photos 2016; Preist et al, 2014; Sheng, 2013; Simões and De Amicis, 2016; Talasila et al, 2016; Uzun et al, 2013 Answering questions/sharing knowledge answering user-generated questions, providing feedback, knowledge-sharing in communities Ipeirotis and Gabrilovich, 2014; Inaba et al, 2015; Y. Liu, Alexandrova, Nakajima et al, 2011*; Machnik et al, 2015; Pothineni et al, 2014; Vasilescu et al, 2014 6 Creative creation work idea creation, algorithm development, requirements elicitation Bentzien et al, 2013; Choi et al, 2014; Dos Santos et al, 2015; Lauto and Valentin, 2016; Snijders et al, 2015; Yakushin and Lee, 2014 6 Text annotation work text annotation, medical text annotation, biological data annotation Cao et al, 2015; Chamberlain, 2014; Dumitrache et al, 2013; Nose and Hishiyama, 2013; Ustalov, 2015 5 Assessment work relationship building, relevance assessment, classification work, decision-making Eickhoff et al, 2012; Harris, 2014; Melenhorst et al, 2015; Prestopnik and Tang, 2015; Yu et al, 2015 5 Searching for and/or optimization of tasks document searching, searching for digital profiles, finding optimal solutionsHe et al, 2014; T. Y. Lee et al, 2013;Nunzio et al, 2016;Sørensen et al, 2016;Tinati et alno clear work description provided, usergenerated tasks, social activitiesCucari et al, 2016;J. J. Lee et al, 2013;Nagai et al, 2014; Sakamoto and Nakajima, 2014 4 References in bold refer to studies in which empirical results about gamification have been reported.…”