Expected values and prediction errors for all different conditions
| Condition | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
|---|---|---|---|---|---|---|---|---|
| Probability | 0.26 | 0.66 | 0.26 | 0.66 | 0.26 | 0.66 | 0.26 | 0.66 |
| Magnitude | 1 | 1 | 5 | 5 | 1 | 1 | 5 | 5 |
| Outcome | 1 | 1 | 5 | 5 | −1 | −1 | −5 | −5 |
| EV total | −0.48 | 0.32 | −2.40 | 1.60 | −0.48 | 0.32 | −2.40 | 1.60 |
| Prediction error EV total | 1.48 | 0.68 | 7.40 | 3.40 | −0.52 | −1.32 | −2.60 | −6.60 |
| EV+ | 0.26 | 0.66 | 1.30 | 3.30 | 0.26 | 0.66 | 1.30 | 3.30 |
| Prediction error EV+ | 0.74 | 0.34 | 3.70 | 1.70 | −1.26 | −1.66 | −6.30 | −8.30 |
| EV− | −0.74 | −0.34 | −3.70 | −1.70 | −0.74 | −0.34 | −3.70 | −1.70 |
| Prediction error EV− | 1.74 | 1.34 | 8.70 | 6.70 | −0.26 | −0.66 | −1.30 | −3.30 |
Mean corrected versions of these vectors were used as linear contrasts in subsequent SPM analyses.