Determining negation scope and strength in sentiment analysis

A.C. Hogenboom, P. Iterson, van, B.M.W.T. Heerschop, F. Frasincar, U. Kaymak

Onderzoeksoutput: Hoofdstuk in Boek/Rapport/CongresprocedureConferentiebijdrageAcademicpeer review

51 Citaten (Scopus)

Samenvatting

A key element for decision makers to track is their stakeholders' sentiment. Recent developments show a tendency of including various aspects other than word frequencies in automated sentiment analysis approaches. One of these aspects is negation, which can be accounted for in various ways. We compare several approaches to accounting for negation in sentiment analysis, differing in their methods of determining the scope of influence of a negation keyword. On a set of English movie review sentences, the best approach is to consider two words, following a negation keyword, to be negated by that keyword. This method yields a significant increase in overall sentiment classification accuracy and macro-level F1 of 5.5% and 6.2%, respectively, compared to not accounting for negation. Additionally optimizing sentiment modification of negated words to a value of -1.27 rather than -1 yields a significant 7.1% increase in accuracy and a significant 8.0% increase in macro-level F1.
Originele taal-2Engels
TitelProceedings of the 2011 IEEE International Conference on Systems, Man, and Cybernetics (SMC 2011), 9-12 October 2011, Anchorage, Alaska
Plaats van productieAnchorage, AK, USA
UitgeverijInstitute of Electrical and Electronics Engineers
Pagina's2589-2594
ISBN van geprinte versie978-1-4577-0652-3
DOI's
StatusGepubliceerd - 2011
Evenement2011 IEEE International Conference on Systems, Man, and Cybernetics (SMC 2011) - Anchorage, Verenigde Staten van Amerika
Duur: 9 okt 201112 okt 2011

Congres

Congres2011 IEEE International Conference on Systems, Man, and Cybernetics (SMC 2011)
Verkorte titelSMC 2011
Land/RegioVerenigde Staten van Amerika
StadAnchorage
Periode9/10/1112/10/11
Ander2011 IEEE International Conference on Systems, Man, and Cybernetics (SMC 2011)

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