TY - CHAP U1 - Buchbeitrag A1 - Schulder, Marc A1 - Wiegand, Michael A1 - Ruppenhofer, Josef A1 - Köser, Stephanie ED - Calzolari, Nicoletta ED - Choukri, Khalid ED - Cieri, Christopher ED - Declerck, Thierry ED - Goggi, Sara ED - Hasida, Koiti ED - Isahara, Hitoshi ED - Maegaard, Bente ED - Mariani, Joseph ED - Mazo, Hélène ED - Moreno, Asuncion ED - Odijk, Jan ED - Piperidis, Stelios ED - Tokunaga, Takenobu T1 - Introducing a lexicon of verbal polarity shifters for English T2 - Proceedings of the eleventh international conference on language resources and evaluation (LREC 2018), 7-12 May 2018, Miyazaki, Japan N2 - The sentiment polarity of a phrase does not only depend on the polarities of its words, but also on how these are affected by their context. Negation words (e.g. not, no, never) can change the polarity of a phrase. Similarly, verbs and other content words can also act as polarity shifters (e.g. fail, deny, alleviate). While individually more sparse, they are far more numerous. Among verbs alone, there are more than 1200 shifters. However, sentiment analysis systems barely consider polarity shifters other than negation words. A major reason for this is the scarcity of lexicons and corpora that provide information on them. We introduce a lexicon of verbal polarity shifters that covers the entirety of verbs found in WordNet. We provide a fine-grained annotation of individual word senses, as well as information for each verbal shifter on the syntactic scopes that it can affect. KW - sentiment analysis KW - polarity shifter KW - Negation KW - lexical semantics KW - lexicon KW - Semantische Analyse KW - Polarität KW - Negation KW - Englisch Y1 - 2018 U6 - https://nbn-resolving.org/urn:nbn:de:bsz:mh39-74947 UN - https://nbn-resolving.org/urn:nbn:de:bsz:mh39-74947 UR - http://www.lrec-conf.org/proceedings/lrec2018/summaries/110.html SN - 979-10-95546-00-9 SB - 979-10-95546-00-9 SP - 1393 EP - 1397 PB - European language resources association (ELRA) CY - Paris, France ER -