Figure 4.

Model comparison by differences in the Akaike information criterion (AIC) scores in the parsimonious learning-rate adjustment models (LA models). The AIC scores of the LA models were compared. One of the models has no forgetting process (LA), and the other three have a forgetting rate parameter for the forgetting process and either a free default-value parameter (LA-FD), a fixed default value of 0 (LA-F0), or a default value of 0.5 (LA-F05). (A) The LA-FD model was favored over the LA model (red bars favor the LA-FD model, and blue bars favor the LA model). (B) By including a default-value parameter, the data fit was improved (red bars favor the LA-FD model, and blue bars favor the LA-F0 model). (C) No statistically significant improvement was observed by fixing the default value at 0.5 (red bars favor the LA-F05 model, and blue bars favor the LA-FD model). Note that the scales of the vertical axis are different among the panels.