Proceedings of the Annual Meeting of the Cognitive Science Society

Two experiments compared the influence of the probability of the effect given the absence of the candidate cause on the causal judgments of candidate causes with the same AP, defined as the difference between the probability of the effect in the presence of a candidate cause and that in its absence. Our results strongly support the power PC theory (Cheng, 1997) but contradict the Rescorla-Wagner model (1972) and the traditional AP model.