Making sense of strangers' expertise from signals in digital artifacts.

N. Sadat Shami Kate Ehrlich Geri Gay Jeffrey T. Hancock Making sense of strangers' expertise from signals in digital artifacts. 69-78 2009 CHI http://doi.acm.org/10.1145/1518701.1518713 conf/chi/2009 db/conf/chi/chi2009.html#ShamiEGH09