TurkGate on the Experimental Turk April 22, 2013 I wrote this essay with Adam Darlow that Gabriele Paolacci featured in the Experimental Turk. As MTurk was not designed for psychological research, it cannot be expected to provide the experimental control that psychologists typically exercise when recruiting participants for laboratory studies. In particular, MTurk lacks: (I) The ability to exclude participants that have already participated in related studies. (II) The ability to prevent study previews. (III) The ability to verify participants’ completion of a study. TurkGate, or Grouping and Access Tools for External surveys (for use with Amazon Mechanical Turk), gives researchers an easy-to-use web application for providing such control when using MTurk with externally hosted studies (e.g., Qualtrics surveys).