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While much of the work on negation detection has focused on English, we have seen recent developments that provide accurate identification of negation in other languages. In this paper, we provide an overview of negation detection systems and describe an implementation of a Spanish system for negation cue detection and scope identification. We apply this system to the sentiment analysis task, confirming also for Spanish that improvements can be gained from accurate negation detection. The paper contributes an implementation of negation detection for sentiment analysis in Spanish and a detailed error analysis. This is the first work in Spanish in which a machine learning negation processing system is applied to the sentiment analysis task. Existing methods have used negation rules that have not been assessed, perhaps because the first Spanish corpus annotated with negation for sentiment analysis has only recently become available.<\/jats:p>","DOI":"10.1017\/s1351324920000376","type":"journal-article","created":{"date-parts":[[2020,7,7]],"date-time":"2020-07-07T05:58:10Z","timestamp":1594101490000},"page":"225-248","update-policy":"https:\/\/doi.org\/10.1017\/policypage","source":"Crossref","is-referenced-by-count":12,"title":["Negation detection for sentiment analysis: A case study in Spanish"],"prefix":"10.1017","volume":"27","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-3274-8825","authenticated-orcid":false,"given":"Salud Mar\u00eda","family":"Jim\u00e9nez-Zafra","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Noa P.","family":"Cruz-D\u00edaz","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6750-8891","authenticated-orcid":false,"given":"Maite","family":"Taboada","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Mar\u00eda Teresa","family":"Mart\u00edn-Valdivia","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"56","published-online":{"date-parts":[[2020,7,7]]},"reference":[{"key":"S1351324920000376_ref9","doi-asserted-by":"publisher","DOI":"10.1016\/S0022-5371(69)80002-2"},{"key":"S1351324920000376_ref65","first-page":"129","article-title":"La negaci\u00f3n en espa\u00f1ol, chino, ingl\u00e9s y alem\u00e1n","volume":"2","author":"Wang","year":"2006","journal-title":"Encuentros en Catay"},{"key":"S1351324920000376_ref5","unstructured":"Benamara, F. , Chardon, B. , Mathieu, Y.Y. , Popescu, V. and Asher, N. 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