We present the results of a survey that collected information about the
demographics of participants on Amazon Mechanical Turk, together with
information about their level of activity and motivation for working on
Amazon Mechanical Turk. We find that approximately 50% of the workers
come from the United States and 40% come from India. Country of origin
tends to change the motivating reasons for workers to participate in the
marketplace. Significantly more workers from India participate on
Mechanical Turk because the online marketplace is a primary source of
income, while in the US most workers consider Mechanical Turk a
secondary source of income. While money is a primary motivating reason
for workers to participate in the marketplace, workers also cite a
variety of other motivating reasons, including entertainment and education