Threshold-based Naïve Bayes classifier

Maurizio Romano (), Giulia Contu (), Francesco Mola () and Claudio Conversano ()
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Maurizio Romano: University of Cagliari
Giulia Contu: University of Cagliari
Francesco Mola: University of Cagliari
Claudio Conversano: University of Cagliari

Advances in Data Analysis and Classification, 2024, vol. 18, issue 2, No 5, 325-361

Abstract: Abstract The Threshold-based Naïve Bayes (Tb-NB) classifier is introduced as a (simple) improved version of the original Naïve Bayes classifier. Tb-NB extracts the sentiment from a Natural Language text corpus and allows the user not only to predict how much a sentence is positive (negative) but also to quantify a sentiment with a numeric value. It is based on the estimation of a single threshold value that concurs to define a decision rule that classifies a text into a positive (negative) opinion based on its content. One of the main advantage deriving from Tb-NB is the possibility to utilize its results as the input of post-hoc analysis aimed at observing how the quality associated to the different dimensions of a product or a service or, in a mirrored fashion, the different dimensions of customer satisfaction evolve in time or change with respect to different locations. The effectiveness of Tb-NB is evaluated analyzing data concerning the tourism industry and, specifically, hotel guests’ reviews from all hotels located in the Sardinian region and available on Booking.com. Moreover, Tb-NB is compared with other popular classifiers used in sentiment analysis in terms of model accuracy, resistance to noise and computational efficiency.

Keywords: Naïve Bayes; Booking.com; Customer satisfaction; Sentiment analysis; Natural language processing; Word of mouth; 62-08; 62C10; 62F15; 62H30; 62P20; 68T50 (search for similar items in EconPapers)
Date: 2024
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DOI: 10.1007/s11634-023-00536-8

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