Table 5 Performance of the classification rules based on single features and on the best subset of features
Features | ACC | SEN | SPE | PPV | NPV | Classified as stress if |
|---|---|---|---|---|---|---|
SD2 | 73% | 79% | 67% | 70% | 76% | SD2<0.0646 |
D 2 | 73% | 69% | 76% | 74% | 71% | D 2 <2.2533 |
REC | 71% | 67% | 76% | 74% | 70% | REC>0.3791 |
En(r chon ) | 71% | 64% | 79% | 75% | 69% | En(r chon )<1.0530 |
α 1 | 71% | 57% | 86% | 80% | 67% | α 1 <1.2479 |
ShEn | 68% | 64% | 71% | 69% | 67% | ShEn>3.3060 |
l mean | 67% | 57% | 76% | 71% | 64% | l mean >13.2302 |
En(0.2) | 64% | 62% | 67% | 65% | 64% | En(0.2)<1.0517 |
l max | 60% | 62% | 57% | 59% | 60% | l max <250.6263 |
En(r max ) | 58% | 64% | 52% | 57% | 59% | En(r max )<1.1099 |
DET | 56% | 69% | 43% | 55% | 58% | DET>0.9870 |
α 2 | 40% | 50% | 31% | 42% | 38% | α 2 <0.7711 |
SD1 | 39% | 33% | 45% | 38% | 40% | SD1>0.0243 |
SD1,SD2, En(0.2) | 90% | 86% | 95% | 95% | 87% | See formula 15 |