@inproceedings{krause_playful_2012,
 address = {Toronto, Canada},
 author = {Krause, Markus and Smeddinck, Jan and Takhtamysheva, Aneta and Markov, Velislav and Runge, Nina},
 booktitle = {Proceedings of the 4th Human Computation Workshop},
 publisher = {IEEE Computer Society},
 title = {Playful Surveys: Easing Challenges of Human Subject Research with Online Crowds},
 year = {2012}
}