William Poirier

William is a Ph.D. candidate in Political Science at Western University and is affiliated with the Canada Research Chair in Political Methodology. He holds Master’s degrees from New York University and Université Laval. His research focuses on public opinion, voting behaviour, and political psychology from a comparative perspective, with a particular emphasis on methodological challenges in survey research, including attention measurement and statistical visualization. His dissertation examines respondent inattention in self-administered surveys using cross-national election panel data and laboratory experiments. His work has been published in Political Analysis and the Canadian Journal of Political Science, and he is the co-developer of the R package VizTest.

Selected publications

• Armstrong II, D. A., & Poirier, W. (2025). Decoupling Visualization and Testing when Presenting Confidence Intervals. Political Analysis, 33(3), 252-257.
• Poirier, W., Charest, A. S., Dufresne, Y., Fortier-Chouinard, A., & Fréchet, N. (2025). Sondages probabilistes et autres créatures mythiques: usages et limites de la calibration des sondages non probabilistes. Canadian Journal of Political Science/Revue canadienne de science politique, 58(3), 681-698.

Website: https://williampo1.github.io/