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First ACM International Conference on Web Search and Data Mining - WSDM 2008

Opinion Spam and Analysis

author: Nitin Jindal, University of Illinois

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*Slides*
0:00	Opinion Spam and Analysis
0:26	Motivation
1:28	Review Spam
2:19	Different from Other Spam Types
3:03	Overview
3:21	Amazon Data
3:44	Log-Log Plot
5:21	Observations
5:24	Review Ratings
6:23	Duplicate Reviews
6:58	Members Who Duplicated Reviews
7:38	Types of Duplicate Reviews
8:51	Categorization of Review Spam
9:33	Spam Detection
9:59	Detecting Type 2 & Type 3 Spam Reviews
10:27	Features Construction
11:21	Experimental Results
12:07	Type 1 Spam Reviews
13:20	Predictive Power of Duplicates
14:05	Outlier Reviews
14:39	Lift Curve for Outlier Reviews
15:48	Other Interesting Outlier Reviews
16:08	Only Reviews
16:43	Reviews from Top-Ranked Reviewers
17:21	Reviews with Different Levels of Feedbacks
17:36	Reviews of Products with Varied Sales Ranks
17:59	Conclusions
19:40	- Questions

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