Table 1.
Consistency of performance.
| Go stimulus color | ||||
|---|---|---|---|---|
| Blue | Yellow | t(26) | p | |
| α | 0.65 (0.30) | 0.61 (0.27) | 0.51 | 0.614 |
| α (surrogate) | 1.35 (0.09) | 1.34 (0.12) | 0.61 | 0.549 |
| (2 − α)/21 | 0.67 (0.15) | 0.70 (0.13) | ||
| γ | 0.25 (0.08) | 0.26 (0.14) | 0.25 | 0.802 |
| γ (surrogate) | 0.05 (0.04) | 0.05 (0.04) | 0.47 | 0.644 |
| (1 + γ)/21 | 0.62 (0.04) | 0.63 (0.07) | ||
| β | 0.72 (0.09) | 0.74 (0.10) | 0.80 | 0.432 |
| β (surrogate) | 0.56 (0.02) | 0.56 (0.02) | 0.61 | 0.546 |
| Omission errors, % | 2.35 (4.21) | 3.98 (8.58) | 1.28 | 0.212 |
| Commission errors, % | 18.64 (11.39) | 20.00 (9.61) | 0.85 | 0.403 |
| RTV, ms | ||||
| Go | 67.67 (19.27) | 70.40 (24.82) | 0.75 | 0.458 |
| NoGo | 61.95 (31.17) | 54.21 (25.16) | 1.12 | 0.272 |
| MRT, ms | ||||
| Go | 316.86 | 321.09 | 0.71 | 0.483 |
| NoGo | 273.62 | 277.68 | 0.73 | 0.471 |
Mean (SD) of the ACF (α), PSD (γ) and DFA (β) scaling exponents and performance measures in the two versions of the Go/NoGo task, with either blue or yellow Gostimulus color. Omissions refer to the non-responded Gostimuli and commissions to responses to NoGostimuli. The t and p values are obtained from paired samples t-tests between the two versions of the task with switched stimulus colors.
1For time series originating from a critical system and exhibiting genuine LRTCs, the ACF (α), PSD (γ) and DFA (β) scaling exponents are theoretically coupled6, 35 by the relationship β = (2 − α)/2 = (1 + γ)/2.