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The Demographic and Political Composition of Mechanical Turk Samples

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  • Kevin E. Levay
  • Jeremy Freese
  • James N. Druckman

Abstract

One of the most notable recent developments in survey research is the increased usage of online convenience samples drawn from Amazon’s Mechanical Turk (MTurk). While scholars have noted various social and political differences (e.g., age, partisanship) between MTurk and population-based samples, the breadth and depth of these variations remain unclear. We investigate the extent to which MTurk samples differ from population samples, and the underlying nature of these differences. We do so by replicating items from the population-based American National Election Studies (ANES) 2012 Time Series Study in a survey administered to a sample of MTurk respondents. With few exceptions, we not only find that MTurk respondents differ significantly from respondents completing the 2012 ANES via the Web but also that most differences are reduced considerably when controlling for easily measurable sample features. Thus, MTurk respondents do not appear to differ fundamentally from population-based respondents in unmeasurable ways. This suggests that MTurk data can be used to advance research programs, particularly if researchers measure and account for a range of political and demographic variables as needed.

Suggested Citation

  • Kevin E. Levay & Jeremy Freese & James N. Druckman, 2016. "The Demographic and Political Composition of Mechanical Turk Samples," SAGE Open, , vol. 6(1), pages 21582440166, March.
    • Handle: RePEc:sae:sagope:v:6:y:2016:i:1:p:2158244016636433
    DOI: 10.1177/2158244016636433
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    References listed on IDEAS

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    1. Huber, Gregory A. & Hill, Seth J. & Lenz, Gabriel S., 2012. "Sources of Bias in Retrospective Decision Making: Experimental Evidence on Voters’ Limitations in Controlling Incumbents," American Political Science Review, Cambridge University Press, vol. 106(4), pages 720-741, November.
    2. Krupnikov, Yanna & Levine, Adam Seth, 2014. "Cross-Sample Comparisons and External Validity," Journal of Experimental Political Science, Cambridge University Press, vol. 1(1), pages 59-80, April.
    3. repec:cup:judgdm:v:5:y:2010:i:5:p:411-419 is not listed on IDEAS
    4. Mullinix, Kevin J. & Leeper, Thomas J. & Druckman, James N. & Freese, Jeremy, 2015. "The Generalizability of Survey Experiments," Journal of Experimental Political Science, Cambridge University Press, vol. 2(2), pages 109-138, January.
    5. Kevin Arceneaux, 2012. "Cognitive Biases and the Strength of Political Arguments," American Journal of Political Science, John Wiley & Sons, vol. 56(2), pages 271-285, April.
    6. Berinsky, Adam J. & Huber, Gregory A. & Lenz, Gabriel S., 2012. "Evaluating Online Labor Markets for Experimental Research: Amazon.com's Mechanical Turk," Political Analysis, Cambridge University Press, vol. 20(3), pages 351-368, July.
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