Science has shown that people speak differently when they lie. We found that prevalent beliefs about what changes are not correct for all cultures. Research on deception has tended to use Western subject populations. This is problematic because culture affects the cognitive and affective factors that underpin truth-teller—liar differences. Our study of a large community sample found opposing changes in linguistic self-presentation and detail provision across cultures. These data raise questions about the efficacy of using established language-based credibility assessment methods with non-Western suspects.

Full paper available at Royal Society Open Science. Data available alongside the paper.