@article{unknown2015participation,
  title={Participation and contribution in crowdsourced surveys},
  author={Robert Swain and Alex Berger and Joshua Bongard and Paul Hines},
  journal={PloS one},
  volume={10},
  number={4},
  journalpage={http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0120521},
  year={2015},
  citations={}
}