Model-based behavioral results. A, The probability for the ToM model (98.2%) was higher than that for the fixed strategy model for controls, while the fixed strategy model was dominant (78.6%) in individuals with ASCs. B, Diagnosis measurement scores, ADI-R and ASDI, were significantly higher for the ASC participants whose behavior fit better with the fixed strategy model (n = 12) than those showing a better fit with the ToM model (n = 5). C, In the ASC group, the greater the expectation of recursive belief inference, the more severe was the autism symptomatology (n = 14, r = −0.52, p = 0.055), as measured by the sum of scores on the ADI-R and the ASDI. D, The estimated forgetting parameter for the ASC group (mean ± SD = 0.57 ± 0.19) was significantly higher than that for the control group (0.93 ± 0.13) (p < 0.1 × 10−6). E, The estimated sophistication for the individuals with autism showed significant positive correlation with individual IQ scores (left panel: n = 17, r = 0.54, p = 0.026), while there was no correlation for the control participants (right panel: n = 17, r = 0.02).