Table 3.
Performance in the stop signal task across experiments 1 and 2 as measured by the Race Model and kinematic method
| Variable | Variable label | Staircase | Exp. 1 (n = 23) | Exp. 2 (n = 34) |
|---|---|---|---|---|
| Basic behavioral performance | ||||
| Go errors (%) | Omissions | 0.1 ± 0.3 | 0.3 ± 0.5 | |
| Choice errors | 0 ± 0 | 0.4 ± 0.8 | ||
| Missed target | 4.5 ± 3.5 | 3.9 ± 3.3 | ||
| False alarms | 1.6 ± 1.2 | 1.5 ± 2.0 | ||
| Go response latency (ms) | Reaction time | 424 ± 53 | 468 ± 85 | |
| Total response time | 836 ± 83 | 931 ± 122 | ||
| Failed stop response latency (ms) | Reaction time | Home | 397 ± 49 | 444 ± 77 |
| Total response time | Target | 768 ± 83 | 857 ± 113 | |
| Stop signal delay (ms) | SSD | Home | 103 ± 55 | 157 ± 109 |
| SSD | Target | 500 ± 76 | 633 ± 134 | |
| Stop success (%) | pStop | Home | 45 ± 6 | 45 ±6 |
| pStop | Target | 49 ± 3 | 50 ± 3 | |
| Race Model analysis | ||||
| Stopping latency (ms) | SSRTRM | Home | 337 ± 54 | 329 ± 59 |
| SSRTRM | Target | 338 ± 85 | 297 ± 65 | |
| Kinematic analysis | ||||
| Stopping latency (ms) | SSRTK (ms) | Home | 329 ± 63 | 327 ±56 |
| SSRTK (ms) | Target | 334 ± 89 | 331 ±53 | |
| Variability of stopping latency (ms) | SD-SSRTK (ms) | Home | 57 ± 19 | 64 ±25 |
| SD-SSRTK (ms) | Target | 56 ± 22 | 67 ±27 | |
| Trigger failures (%) | TFK | Home | 0.9 ±1.3 | 1.4 ±3.5 |
Key: pStop probability of stopping, SSD stop signal delay, SSRT stop signal reaction time, SD-SSRT standard deviation of stop signal reaction time, TF trigger failures