Table 3: Accuracy of feature-based opinion classification using linguistic hedges.

DatasetApproaches to feature-based classification using linguistic hedges
   Approach 1: valence points adjustment approach   Approach 2: Vo and Ock's fuzzy adjustment functionsApproach 3: our proposed method
Binary classification accuracy (%)Fine-grained classification accuracy (%)Binary classification accuracy (%)Fine-grained classification accuracy (%)Binary classification accuracy (%)Fine-grained classification accuracy (%)

Tablets80.8771.6287.2879.7390.1687.45
E-book readers76.2165.8977.3772.9585.4482.72
Smartphones88.3274.3689.1683.9392.5689.95
Laptops84.2673.3286.6779.6588.6785.77
Average82.4271.3085.1279.0789.2186.47