Sentiment Analysis: How to Derive Prior Polarities from SentiWordNet
Table 6: Accuracy results for PoS using SWN3
['[EMPTY]', 'SVMfs Acc.  [ITALIC] μ', 'SVMfs Acc.  [ITALIC] σ', '[ITALIC] best_ [ITALIC] f Acc.  [ITALIC] μ', '[ITALIC] best_ [ITALIC] f Acc.  [ITALIC] σ']
Next, we wanted to understand if the performance of our approach, using SWN3, was consistent across word PoS. In particular for ADJ there are 1,073 words, 922 for NOUN and 508 for VERB. We discarded adverbs since the class was too small to allow reliable evaluation and efficient learning (only 54 instances). The results show a greater accuracy for adjectives (p<0.01), while performance for nouns and verbs are similar.