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How Recent History Affects Perception: The Normative Approach and Its Heuristic Approximation

Figure 4

The implicit memory model.

The parameters of the implicit memory model, the standard deviation of the noise, and the memory weight, were estimated for each of our experimental blocks to minimize the square error between the model and the observed behavior. These parameters were used to simulate the behavior of an implicit-memory participant in that block. The results of the simulation are presented in A and B, (same presentation as in Fig. 2A and 2B, respectively). Note the similarity between Figs. 4A and 2A and between Figs. 4B and 2B, indicating that the implicit-memory model can account for the contraction bias. C, Estimation of the recency effect in the implicit memory model. Same analysis as in Fig. 3.

doi: https://doi.org/10.1371/journal.pcbi.1002731.g004