Imbalanced Sentiment Classification Enhanced with Discourse Marker
Table 3: Experimental results on highly imbalanced datasets. “IR” denotes imbalanced-ratio.
['IR', 'Method', 'Setting', 'MR', 'SST2', 'CR', 'Avg improvement']
In this section, we test our method in highly imbalanced scenario, compared with only using oversampling method. We set the imbalanced-ratio λ as different values. Significant improvements are consistently obtained by integrating our method with oversampling. In extremely imbalanced scenario, i.e. λ=50,100, integrated method even shows more boost of performance.