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Previous research suggests that people systematically overestimate the occurrence of both positive and negative events, compared with neutral future events, and that these biases are due to a misattribution of arousal elicited by utility (stake-likelihood hypothesis; SLH; Vosgerau, 2010). However, extant research has provided only indirect support for these arousal misattribution processes. In the present research, we initially aimed to provide a direct test of the SLH by measuring arousal with galvanic skin responses to examine the mediating role of arousal. We observed no evidence that measured arousal mediated the impact of utility on probability estimates. Given the lack of direct support for the SLH in Experiment 1, Experiments 2-5 aimed to assess the SLH by replicating some of the original findings that provided support for arousal misattribution as a mechanism. Despite our best efforts to create experimental conditions under which we would be able to demonstrate the stake-likelihood effect, we were unable to replicate previous results, with a Bayesian meta-analysis demonstrating support for the null hypothesis. We propose that accounts based on imaginability and loss function asymmetry are currently better candidate explanations for the influence of outcome utility on probability estimates.

journal of experimental psychology general

Conceptual and direct replications fail to support the stake-likelihood hypothesis as an explanation for the interdependence of utility and likelihood judgments.