Table 4. Performance of techniques evaluation in predicting helpful reviews.
Comparison of the correlation coefficient and SelectKBest scores based on the features.
| Features | Correlation coefficient scores with helpful | SelectKBest scores with helpful | Feature category |
|---|---|---|---|
| Rating | 0.279878 | 1455.2 | Metadata |
| Reviewer Location Existence | 0.199417 | 405.4025 | Metadata |
| Reviewer Name Existence | 0.183377 | 316.0375 | Metadata |
| Subjectivity | 0.143916 | 276.8457 | Subjectivity |
| Polarity | 0.141497 | 311.0764 | Polarity |
| Length | 0.118247 | 112.8417 | Linguistic |
| Adjective | 0.117354 | 118.9454 | Linguistic |
| IAV | 0.11467 | 117.5278 | Linguistic |
| Noun | 0.108986 | 95.1823 | Linguistic |
| Adverb | 0.107725 | 96.45396 | Linguistic |
| Sentences in a Review | 0.107396 | 90.1899 | Linguistic |
| Capitalized Words | 0.105275 | 95.15608 | Linguistic |
| SAV | 0.09265 | 69.18848 | Linguistic |
| ARI | 0.083694 | 57.38236 | Readability |
| RIX | 0.080336 | 30.78826 | Readability |
| LIX | 0.076998 | 32.57184 | Readability |
| FK | 0.076388 | 31.86075 | Readability |
| DCI | 0.066897 | 34.63997 | Readability |
| FKGL | 0.060843 | 6.485602 | Readability |
| SV | 0.057572 | 36.28841 | Linguistic |
| GFI | 0.056262 | 5.642237 | Readability |
| SMOGI | 0.04897 | 49.93567 | Readability |
| DAV | 0.048794 | 28.46312 | Linguistic |
| CLI | 0.038327 | 34.69642 | Readability |
| Reviewer Location Existence Validation | 0.030635 | 10.22768 | Metadata |
| Reviewer Name Existence Validation | 0.022298 | 7.191998 | Metadata |
| FRE | −0.07262 | 36.80358 | Readability |
Notes.
The bold scores indicate the selected features in this research.