Title
Detection of fake opinions using time series.
Abstract
Proposing a novel model to detect spam reviews efficiently.Demonstrating the integral role of burst patterns in detection of spam reviews.Comparing the approach with two common methods to show how significant it is. Today's e-commerce is highly depended on increasingly growing online customers' reviews posted in opinion sharing websites. This fact, unfortunately, has tempted spammers to target opinion sharing websites in order to promote and demote products. To date, different types of opinion spam detection methods have been proposed in order to provide reliable resources for customers, manufacturers and researchers. However, supervised approaches suffer from imbalance data due to scarcity of spam reviews in datasets, rating deviation based filtering systems are easily cheated by smart spammers, and content based methods are very expensive and majority of them have not been tested on real data hitherto.The aim of this paper is to propose a robust review spam detection system wherein the rating deviation, content based factors and activeness of reviewers are employed efficiently. To overcome the aforementioned drawbacks, all these factors are synthetically investigated in suspicious time intervals captured from time series of reviews by a pattern recognition technique. The proposed method could be a great asset in online spam filtering systems and could be used in data mining and knowledge discovery tasks as a standalone system to purify product review datasets. These systems can reap benefit from our method in terms of time efficiency and high accuracy. Empirical analyses on real dataset show that the proposed approach is able to successfully detect spam reviews. Comparison with two of the current common methods, indicates that our method is able to achieve higher detection accuracy (F-Score: 0.86) while removing the need for having specific fields of Meta data and reducing heavy computation required for investigation purposes.
Year
DOI
Venue
2016
10.1016/j.eswa.2016.03.020
Expert Syst. Appl.
Keywords
Field
DocType
Review spam,Spam detection,Opinion spam,Fake reviews
Data mining,Metadata,Scarcity,Opinion spam,Computer science,Filter (signal processing),Spambot,Artificial intelligence,Knowledge extraction,Product reviews,Fake reviews,Machine learning
Journal
Volume
Issue
ISSN
58
C
0957-4174
Citations 
PageRank 
References 
14
0.52
27
Authors
3
Name
Order
Citations
PageRank
Atefeh Heydari1361.67
Mohammad ali Tavakoli2361.67
Naomie Salim342448.23