Table 6. Summary of group differences in model parameters.
For each parameter and task, we report the mean difference in the group-level posterios (Mdiff: patients–controls) and Bayes Factors testing for directional effects[14,46]. Bayes Factors < .33 indicate evidence for a reduction in the patient group, whereas Bayes Factors >3 indicate evidence for an increase in the patient group (see Methods section). Standardized effect sizes (Cohen’s d) were calculated based on the posterior group-level estimates of mean and precision (see methods section).
| Model parameter | Temporal discounting | Risky Choice | ||||
|---|---|---|---|---|---|---|
| Mdiff | d | BF | Mdiff | d | BF | |
| Boundary separation (α) | -.012 | -.013 | 1.03 | -.368 | -.42 | .203 |
| Non decision time (τ) | .184 | .44 | 4.39 | .166 | .35 | 3.52 |
| Starting point / bias (z) | -.025 | -.49 | .196 | .017 | .28 | 2.55 |
| Drift rate v (max) | -.184 | -.26 | .647 | -.027 | -.075 | .739 |
| Drift rate v (coeff) | 3.14 | 1.11 | 7.43 | .033 | .63 | 2.49 |
| Log(k)now | .734 | .33 | 2.85 | - | - | - |
| Shiftlog(k) | .529 | 2.22 | 69.9 | - | - | - |
| Log(h) | - | - | - | -.447 | -.28 | .278 |