Behavioural results of the variant of the Monetary Incentive Delay task
| Group; mean ± SD | ||||
|---|---|---|---|---|
| Result | Schizophrenia, n = 27 | Control, n = 25 | Statistical test* | p value |
| Response time, ms | ||||
| No reward | 555.4 ± 111.0 | 519.2 ± 81.0 | — | — |
| Low reward | 539.4 ± 106.1 | 490.3 ± 78.6 | — | — |
| High reward | 505.3 ± 102.7 | 467.5 ± 80.6 | — | — |
| Error trials, total | 6.3 ± 4.4 | 5.7 ± 4.0 | U = 313.5 | 0.66 |
| Total gain, Swiss francs | 36.0 ± 4.6 | 38.9 ± 5.2 | t = 2.1 | 0.040 |
SD = standard deviation.
↵* Potential group differences were investigated using 2-sample t tests for continuous data. For non-normally distributed data we used Mann–Whitney U tests.