Table 7.
Accuracy (%) with (95% CI) for detecting stress and non-stress, and evaluating stress levels using each frontal electrode individually using five-folds cross validation.
| Classifier | Fp1 | Fp2 | F3 | F4 | FZ | F7 | F8 |
|---|---|---|---|---|---|---|---|
| Detection of Stress and Non-stress | |||||||
| KNN | 99.74 (99.70–99.78) |
99.54 (99.49–99.59) |
99.37 (99.35–99.39) |
97.82 (97.77–97.86) |
99 (98.98–99.08) |
99.29 (99.21–99.37) |
98.87 (98.93–99.02) |
| Cubic SVM | 99.64 (99.63–99.65) |
99.39 (99.35–99.43) |
99.18 (99.14–99.22) |
97.78 (97.73–97.84) |
99.22 (99.20–99.25 |
99.14 (99.09–99.19) |
99 (98.99–99.07) |
| Evaluating Stress Levels | |||||||
| KNN | 92 (91.71–92.29) |
90 (89.82–90.34) |
90.74 (90.32–91.16) |
85.58 (85.32–85.85) |
88.76 (87.96–89.56) |
91.36 (90.92–91.79) |
92.5 (92.18–92.82) |
| Cubic SVM | 88.48 (88.06–88.89) |
88.48 (88.21–88.75) |
88.62 (88.07–89.17) |
87.3 (87.0–87.59) |
89.58 (89.29–89.87) |
92.26 (91.89–92.63) |
90.98 (90.60–91.36) |