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Experimental design.
| n | Task | DBS (μA) | Drug challenge | Test design | |
|---|---|---|---|---|---|
| Experiment 1 | 16 | DRT | 0, 35, 75, 100 | – | Latin-square |
| Experiment 2 | 16 | 5-CSRTT, fixed ITI | 0, 35, 75, 100 | – | Latin-square |
| Experiment 3A | 16 HI, 16 LI | 5-CSRTT, fixed ITI | 0, 75 | – | Randomized within-subjects |
| 5-CSRTT, variable ITI | 0, 35, 75, 100 | – | Latin-square | ||
| Experiment 3B | 16 MI | 5-CSRTT, fixed ITI | 0, 75 | Saline/amphetamine | Latin-square |
