Table 5.
Comparison between this study and similar 52-channel fNIRS studies aiming at channel reduction in schizophrenic identification.
| References | Task | Signal | Feature | Feature selection method | Classifier | Accuracy | Number of channels | Specific channels |
|---|---|---|---|---|---|---|---|---|
| Chuang et al. (39) | VFT | oxy-Hb | Time-domain average | Two-sample Kolmogorov–Smirnov test | K-means clustering | 71.72% | 6 | 23 29 31 40 42 52 |
| Ji et al. (13) | VFT | oxy-Hb | FC | Seed-based FC analysis | SVM | 89.67% | 26 | 3–4, 15–18, 24–29, 34–38, 43–50 and 52 |
| Chen et al. (17) | One-back memory task | total-Hb | Activation degree in time domain | Independent sample t-test | SVM | 89.50% | 39 | 1–17, 19–21, 26, 30–31, 33, 35, 37, 39–50 and 52 |
| Ours | VFT | oxy-Hb | Wavelet energy | GA | SVM | 87.00% | 16 | 1 3 6 7 9 10 13 16 19 29 30 32 34 39 45 48 |
| Time-domain average | pGAPSO-I | SVM | 86.50% | 8 | 3 4 19 26 30 39 47 51 |
total-Hb, relative concentration of total hemoglobin.