It is generally thought that pay rate does not affect data quality on Mechanical Turk. For example (Buhrmester, Kwang, & Gosling, 2011) showed that whether Workers are paid 5 cents or one dollar for a survey study, the internal reliability of the surveys does not change. They did show however that fewer Workers will take the surveys that pay less. We recently replicated these findings for both US and India-based Workers (Litman et al, 2014).
What is the completion rate and dropout rate? Dropout rate is defined as the percentage of participants who start taking a study but do not complete it. Dropout rate is sometimes referred to as attrition rate, and is the opposite...
MTurk Requesters are often interested in studying specific groups of people. For example, a researcher may be interested in men over 40, Republicans, people who are concerned about the cleanliness of sponges, or cancer survivors. CloudResearch Panels utilizes various techniques...
Amazon just announced that their Worker Qualification now supports US State locations. It is currently available through their API and is also available through their Web Interface.
