A Software Defect Prediction Approach Based on Hybrid Feature Dimensionality Reduction

Table 4

Cliff’s delta and the effectiveness level.

Cliff’s delta (|δ|)	Effectiveness level
0.000 ≤ |δ| < 0.147	Negligible
0.147 ≤ |δ| < 0.330	Small
0.330 ≤ |δ| < 0.474	Medium
0.474≤ |δ| < 1.000	Large