Table 2.
FIX threshold | 1 | 2 | 5 | 10 | 20 | 30 | 40 | 50 |
---|---|---|---|---|---|---|---|---|
TPR (mean) | 99.9 | 99.8 | 99.7 | 99.6 | 99.3 | 98.8 | 98.4 | 97.4 |
TNR (mean) | 96.7 | 97.5 | 98.5 | 98.9 | 99.3 | 99.5 | 99.6 | 99.7 |
TPR (median) | 100 | 100 | 100 | 100 | 100 | 99.0 | 98.8 | 98.0 |
TNR (median) | 97.1 | 97.7 | 98.8 | 99.2 | 99.5 | 99.6 | 99.7 | 99.8 |
TPR = True Positive Rate, i.e., the percentage of true signals correctly classified. TNR = True Negative Rate, i.e., the percentage of true artefacts correctly classified. As the FIX “threshold” is lowered, TPR is maximised at the expense of high TNR; an “optimal” threshold might be considered to be 5–10.