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CS583, UIC

CS583, UIC

Corpus-based approaches

Rely on syntactic or co-occurrence patterns in large corpora. (Hazivassiloglou and McKeown, ACL-97; Turney, ACL-02; Yu and Hazivassiloglou, EMNLP-03; Kanayama and Nasukawa, EMNLP-06; Ding and Liu SIGIR-07)

Can find domain (not context!) dependent orientations (positive, negative, or neutral).

(Turney, ACL-02) and (Yu and Hazivassiloglou, EMNLP-03) are similar.

Assign opinion orientations (polarities) to words/phrases.

(Yu and Hazivassiloglou, EMNLP-03) is different from (Turney, ACL-02)

use more seed words (rather than two) and use log-likelihood ratio (rather than PMI).

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