Figure 5.

Learning interference model. (A) Prediction of choice probability. The learning interference model predicted choice behaviors of rat in Figure 3 between the 289 and 493 trials. Trials consisted of all four reward-probability settings in the variable-reward condition and the extinction phase. FQ-learning and fixed-choice models were employed as learning rules of variable- and fixed-reward conditions, respectively. Free parameters of the learning interference model were set to achieve maximum likelihood in this session. Dark blue and pink lines show predicted left choice probabilities of the model in variable- and fixed-reward conditions, respectively. Other lines and symbols are as in Figure 3. The learning interference model accurately predicted the choice behaviors of rat. (B) Model variables. (i) Action values of the variable-reward condition were predicted by FQ-learning. (ii) Choice probabilities in the fixed-reward condition were predicted by the fixed-choice model.