A remarking feature of AMT is that tasks can be confined to only workers who live in specific countries, allowing for focused comparisons between subjects from two or more groups. This can eliminate many of the barriers to conducting cross-cultural comparisons of basic psychological processes (e.g, finding a subject pool in the country of interest). An example of such research can be found in Eriksson and Simpson (2010), who used AMT to recruit participants from the US and India and asked them to complete a questionnaire. As Mechanical Turk is populated by an increasingly internationalized workforce, we foresee large scope for cross-culture comparisons in the future.
Eriksson, K., & Simpson, B. (2010). Emotional reactions to losing explain gender differences in entering a risky lottery. Judgment and Decision Making, 5, 159–163.