This is probably one of the most insightful statements I’ve ever read about MTurk
“Running a study in AMT meant we were not only researchers interacting with participants; we were also employers interacting with employees.”
The lesson also is: read about how to do studies using MTurk before you do studies using MTurk. I know a good book if you are interested.
Cite: Brian McInnis and Gilly Leshed. 2016. Running user studies with crowd workers. <em>interactions</em> 23, 5 (August 2016), 50-53. DOI: http://dx.doi.org/10.1145/2968077