Table 4. Difference of the feature values between the drowsy and alert states (region B, 5 sec window).
Region B (drowsy – alert) | ||||||
---|---|---|---|---|---|---|
| ||||||
Feature | Channel 9 | Channel 10 | Channel 11 | Channel 12 | Channel 13 | Channel 14 |
M | 1.7E-03 | −9.5E-04 | 4.7E-04 | −8.6E-04 | −3.4E-04 | −8.1E-04 |
P | 1.7E-03 | −9.7E-04 | 4.6E-04 | −8.6E-04 | −3.4E-04 | −8.0E-04 |
SoP | 3.9E-04 | 0.0E + 00 | 7.8E-05 | 0.0E + 00 | 0.0E + 00 | 0.0E + 00 |
NoP | 17 | 0 | 28 | 0 | 0 | 0 |
M* | −1.1E-04 | −4.6E-04 | −3.0E-04 | −3.8E-04 | −4.5E-04 | −3.1E-04 |
skew | −3.9E-02 | 1.4E-02 | −3.2E-02 | −1.3E-02 | −1.4E-02 | −3.7E-03 |
kurt | 3.7E-02 | 6.9E-02 | −5.3E-02 | 5.5E-02 | 4.6E-02 | −7.3E-02 |
SS | 1.7E-03 | −9.7E-04 | 4.6E-04 | −8.6E-04 | −3.4E-04 | −8.0E-04 |
f | 5.2E-14 | 4.0E-13 | 1.5E-14 | 2.2E-13 | 1.1E-13 | 1.7E-13 |
| ||||||
Channel 15 | Channel 16 | Channel 17 | Channel 18 | Channel 19 | Channel 20 | |
| ||||||
Feat. | 8.9E-04 | −7.7E-04 | 1.3E-03 | 5.1E-04 | 2.5E-03 | 2.1E-03 |
M | 9.1E-04 | −7.5E-04 | 1.3E-03 | 5.0E-04 | 2.6E-03 | 2.1E-03 |
P | 2.6E-04 | 0.0E + 00 | 3.6E-04 | 0.0E + 00 | 7.4E-04 | 6.9E-04 |
SoP | 33 | 0 | 22 | 0 | 19 | 21 |
NoP | −2.4E-04 | −2.4E-04 | −1.1E-04 | −4.2E-05 | 4.1E-04 | 2.5E-04 |
M* | 1.7E-02 | −5.8E-03 | −1.9E-02 | 4.5E-02 | 8.3E-03 | 5.4E-02 |
skew | −7.7E-02 | −1.8E-02 | −1.6E-02 | −2.0E-02 | 4.1E-02 | −5.6E-02 |
kurt | 3.0E-13 | −3.0E-11 | −3.4E-12 | −4.6E-13 | 3.3E-14 | 7.0E-15 |
SS | −1.7E-02 | 0.0E + 00 | −2.2E-02 | 0.0E + 00 | −2.6E-02 | −3.3E-02 |
Note: * indicates the mean value computed from ∆HbR.