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- W2779217680 abstract "Online opinions play an important role for customers and companies because of the increasing use they do to make purchase and business decisions. A consequence of that is the growing tendency to post fake reviews in order to change purchase decisions and opinions about products and services. Therefore, it is really important to filter out deceptive comments from the retrieved opinions. In this paper we propose the character n-grams in tokens, an efficient and effective variant of the traditional character n-grams model, which we use to obtain a low dimensionality representation of opinions. A Support Vector Machines classifier was used to evaluate our proposal on available corpora with reviews of hotels, doctors and restaurants. In order to study the performance of our model, we make experiments with intra and cross-domain cases. The aim of the latter experiment is to evaluate our approach in a realistic cross-domain scenario where deceptive opinions are available in a domain but not in another one. After comparing our method with state-of-the-art ones we may conclude that using character n-grams in tokens allows to obtain competitive results with a low dimensionality representation." @default.
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- W2779217680 date "2017-12-01" @default.
- W2779217680 modified "2023-10-16" @default.
- W2779217680 title "Detecting Deceptive Opinions: Intra and Cross-Domain Classification Using an Efficient Representation" @default.
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- W2779217680 doi "https://doi.org/10.1142/s0218488517400165" @default.
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