Cross-ratio uninorms as an effective aggregation mechanism in Sentiment Analysis

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dc.contributor.author Appel, Orestes en
dc.contributor.author Chiclana, Francisco en
dc.contributor.author Carter, Jenny en
dc.contributor.author Fujita, Hamido en
dc.date.accessioned 2017-02-27T16:02:17Z
dc.date.available 2017-02-27T16:02:17Z
dc.date.issued 2017
dc.identifier.citation Appel, O., Chiclana, F., Carter, J. and Fujita, H. (2017) Cross-ratio uninorms as an effective aggregation mechanism in Sentiment Analysis. Knowledge-Based System, 124, pp. 16-22 en
dc.identifier.uri http://hdl.handle.net/2086/13339
dc.description The file attached to this record is the author's final peer reviewed version. The Publisher's final version can be found by following the DOI link. en
dc.description.abstract There are situations in which lexicon-based methods for Sentiment Analysis (SA) are not able to generate a classification output for specific instances of a given dataset. Most often, the reason for this situation is the absence of specific terms in the sentiment lexicon required in the classification effort. In such cases, there were only two possible paths to follow: (1) add terms to the lexicon (off-line process) by human intervention to guarantee no noise is introduced into the lexicon, which prevents the classification system to provide an immediate answer; or (2) use the services of a word-frequency dictionary (on-line process), which is computationally costly to build. This paper investigates an alternative approach to compensate for the lack of ability of a lexicon-based method to produce a classification output. The method is based on the combination of the classification outputs of non lexicon-based tools. Specifically, firstly the outcome values of applying two or more non-lexicon classification methods are obtained. Secondly, these non-lexicon outcomes are fused using a uninorm based approach, which has been proved to have desirable compensation properties as required in the SA context, to generate the classification output the lexicon based approach is unable to achieve. Experimental results based on the execution of two well-known supervised machine learning algorithms, namely Na\"{i}ve Bayes and Maximum Entropy, and the application of a cross-ratio uninorm operator are presented. Performance indices associated to options (1) and (2) above are compared against the results obtained using the proposed approach for two different datasets. Additionally, the performance of the proposed cross-ratio uninorm operator based approach is also compared when the aggregation operator used is the arithmetic mean instead. It is shown that the combination of non lexicon-based classification methods with specific uninorm operators improves the classification performance of lexicon-based methods, and it enables the offering of an alternative solution to the SA classification problem when needed. The proposed aggregation method could be used as well as a replacement of ensemble averaging techniques commonly applied when combining the results of several machine learning classifiers' outputs. en
dc.language.iso en en
dc.publisher Elsevier en
dc.subject Cross-ratio Uninorms en
dc.subject Semantic Orientation Aggregation en
dc.subject Hybrid Sentiment Analysis en
dc.subject Supervised Machine Learning en
dc.subject Naïve Bayes en
dc.subject Maximum Entropy en
dc.title Cross-ratio uninorms as an effective aggregation mechanism in Sentiment Analysis en
dc.type Article en
dc.identifier.doi https://dx.doi.org/10.1016/j.knosys.2017.02.028
dc.researchgroup Centre for Computational Intelligence en
dc.peerreviewed Yes en
dc.funder N/A en
dc.projectid N/A en
dc.cclicence CC-BY-NC-ND en
dc.date.acceptance 2017-02-25 en


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