On the relationship between honesty-humility and truth-bias

We hypothesized a positive correlation between HEXACO Honesty-Humility (H-H) and truth bias due to higher trustworthiness expectations for people higher in H-H. We also predicted that H-H and the correct classification of truthful and deceptive messages should be uncorrelated. In three high-powered online studies conducted via Prolific, we applied classical lie-truth detection tasks. An internal meta-analysis (N = 1,484) revealed no significant effect, neither for the H-H truth-bias link, nor for the H-H detection accuracy link. We discuss the shortcomings of the present set of studies and theoretical implications for future research on the relationship between personality traits and veracity judgments, focusing on the role of variability in different measurement paradigms.