Drift diffusion model specification
| Number | Model | Starting point (z) | Drift rate (5) | DIC (control) | DIC (threat) |
|---|---|---|---|---|---|
| 1 | Valence independent | z = 0.5 | v | 11,373.43 | 7761.38 |
| 2 | Valence-dependent starting point | 0<z < 1 | v | 11,343.42 | 7757.88 |
| 3 | Valence-dependent drift rate | z = 0.5 | v = β0 + β1 factory desirability | 11,322.83 | 7758.58 |
| 4 | Valence-dependent drift rate and starting point | 0 < z < 1 | v = β0 + β1 factory desirability | 11,306.45 | 7744.82 |
For each group, we ran four models which differed in whether we allowed the starting point to vary (models 2 and 4), whether we included a valence-dependent drift rate bias (models 3 and 4), or neither (model 1). DIC scores show goodness of fit, with lower numbers indicating better fit.