Non-Naïve Participants Can Reduce Effect Sizes

Although researchers often assume their participants are naïve to experimental materials, this is not always the case. We investigated how results in a set of two-condition experiments depended on whether participants completed them once already. Non-naivety markedly decreased effect sizes, especially when participants were assigned to a different condition.


Jesse Chandler, Gabriele Paolacci, Eyal Peer, Pam Mueller, and Kate Ratliff (2015) ,"Non-Naïve Participants Can Reduce Effect Sizes", in NA - Advances in Consumer Research Volume 43, eds. Kristin Diehl , Carolyn Yoon, and , Duluth, MN : Association for Consumer Research, Pages: 18-22.


Jesse Chandler, University of Michigan, USA
Gabriele Paolacci, Erasmus University Rotterdam, The Netherlands
Eyal Peer, Bar-Ilan University, Israel
Pam Mueller, Princeton University, USA
Kate Ratliff, University of Florida, USA


NA - Advances in Consumer Research Volume 43 | 2015

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