There was a paper about this at CHI 2008: http://www-users.cs.umn.edu/~echi/papers/2008-CHI2008/2008-02-mech-turk-online-experiments-chi1049-kittur.pdf http://

There was a paper about this at CHI 2008: http://www-users.cs.umn.edu/~echi/papers/2008-CHI2008/2008-02-mech-turk-online-experiments-chi1049-kittur.pdf http://www-users.cs.umn.edu/~echi/papers/2008-CHI2008/2008-0...