Running head: BELIEF IN PHYSIOGNOMY 1 Lay Beliefs in Physiognomy Explain Overreliance on Facial Impressions Bastian Jaeger and Anthony M. Evans Tilburg University Mariëlle Stel University of Twente Ilja van Beest Tilburg University Draft version: 4 June 2020 Word count: 4992 This paper is currently undergoing peer review. Comments are welcome. Author Note Bastian Jaeger, Anthony M. Evans, and Ilja van Beest, Department of Social Psychology, Tilburg University, The Netherlands; Mariëlle Stel, Department of Psychology of Conflict, Risk and Safety, The Netherlands. All data, analysis scripts, materials, and preregistration documents are available at the Open Science Framework (https://osf.io/s9nj8/). Correspondence concerning this article should be addressed to Bastian Jaeger, Department of Social Psychology, Tilburg University, P.O. Box 90153, 5000 LE Tilburg, The Netherlands. E-mail:
[email protected]. BELIEF IN PHYSIGONOMY 2 Abstract People often rely on a person’s facial appearance when judging their character, even when more diagnostic information is available. This can lead to worse decision outcomes and appearance- based discrimination. What explains this overreliance on facial impressions? In three studies, we examine the role of lay beliefs in physiognomy—the idea that facial features are indicative of a person’s character. We find widespread endorsement of physiognomic beliefs in a representative sample of the Dutch population (Study 1, n = 2,624). Crucially, people with stronger physiognomic belief rely more on facial impressions when making trust decisions (Study 2, n = 224). They are also more confident in their ability to detect corrupt politicians based on facial photographs, but this increased confidence is not associated with superior judgment accuracy (Study 3, n = 406).