Hindsight bias and the activation of counterfactual mind-sets.

Previous research has shown that conditional counterfactuals are positively related to the magnitude of creeping determinism. Unlike previous experiments which show this increased hindsight bias to occur after exceptional antecedents, we investigated another possible factor, namely a prior activation of a counterfactual mind-set. We investigated our prediction using a hypothetical scenario. Prior to reading the hindsight scenario some participants were asked to solve a scrambled-sentence test including conditional counterfactual sentences. Results of two experiments were consistent with our predictions: Participants that solved the scrambled-sentence test perceived the outcome to be more inevitable than participants in a no-outcome control condition and participants in a no-prime control condition. Furthermore, we found that this increase in creeping determinism was mediated by the perceived causal strength of the target antecedent for the occurrence of the outcome, and that the priming-effect did not occur when an unconditional counterfactual mind-set was activated before. The results are interpreted as supporting a causal-model theory of the hindsight bias.