Table 5.
Accuracy (%) | Sensitivity (%) | Specificity (%) | Positive predictive value | Negative predictive value | P‐value according to permutation tests | |
---|---|---|---|---|---|---|
Support vector machines | ||||||
Sad>neutral faces | 68.2 | 63.6 | 72.7 | 0.700 | 0.667 | 0.028* |
Happy>neutral faces | 61.4 | 59.1 | 63.6 | 0.619 | 0.636 | 0.12 |
Sad>neutral faces and happy>neutral faces | 65.9 | 63.6 | 63.6 | 0.667 | 0.682 | 0.045* |
Sad>happy faces | 75.0 | 63.6 | 86.4 | 0.820 | 0.704 | 0.008* |
Gaussian process classifier | ||||||
Sad>neutral faces | 65.9 | 68.2 | 63.6 | 0.652 | 0.667 | 0.043* |
Happy>neutral faces | 56.8 | 59.1 | 54.6 | 0.565 | 0.571 | 0.263 |
Sad>neutral faces and happy>neutral faces | 65.9 | 68.9 | 63.6 | 0.652 | 0.667 | 0.059 |
Sad>happy faces | 79.6 | 81.8 | 77.3 | 0.782 | 0.810 | 0.002* |
Sensitivity and specificity refer to the classification of bipolar depressed subjects. *Significant at statistical threshold P < 0.05.