Table 1.
Descriptive statistics (mean values and standard deviation) of the task-related, driving behavior, and physiological parameters in the five n-back conditions.
| 0-back | 1-back | 2-back | 3-back | 4-back | ||
|---|---|---|---|---|---|---|
| Task-related | Time in correct range (in %) | 92.3 (0.04) | 86.0 (0.09) | 75.8 (0.18) | 69.9 (2.54) | 71.0 (18.6) |
| Reaction time (in seconds) | 1.35 (0.61) | 1.63 (0.65) | 1.84 (0.69) | 2.05 (1.26) | 2.04 (1.16) | |
| Driving behavior | Brake variance (in a.u.) | 0.12 (0.14) | 0.11 (0.14) | 0.11 (0.63) | 0.44 (0.59) | 0.51 (0.68) |
| Throttle variance (in a.u.) | 0.26 (0.08) | 0.30 (0.09) | 0.28 (0.08) | 0.24 (0.11) | 0.23 (0.11) | |
| Steering variance (in 10-4 radians) | 0.69 (0.10) | 1.28 (0.16) | 0.42 (0.09) | 1.31 (0.19) | 0.59 (0.18) | |
| Deviation from lane center (in meters) | 0.15 (0.02) | 0.19 (0.04) | 0.15 (0.04) | 0.18 (0.04) | 0.16 (0.03) | |
| Physiology | Heart rate (in bpm) | 73.8 (12.2) | 75.2 (12.3) | 75.8 (12.7) | 76.3 (13.4) | 77.7 (13.6) |
| RMSSD (in milliseconds) | 39.5 (17.0) | 38.2 (18.2) | 36.1 (16.1) | 35.5 (16.1) | 35.2 (17.8) |
a.u. = arbitrary units.