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Deceptive Opinion Spam Analysis

Deceptive Opinion Spam Analysis. Benjamin Cohen 1 , Rakesh Verma 2. Depts. of Computer Science Johns Hopkins University, Baltimore, MD 1 University of Houston, Houston, TX 2. Motivation. •  Consumers increasingly rate, review and research products online.

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Deceptive Opinion Spam Analysis

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  1. Deceptive Opinion Spam Analysis Benjamin Cohen1, Rakesh Verma2 Depts. of Computer Science Johns Hopkins University, Baltimore, MD1 University of Houston, Houston, TX2

  2. Motivation •  Consumers increasingly rate, review and research products online •  Potential for opinion spam – Disruptive opinion spam – Deceptiveopinion spam DeceptiveOpinionSpam Anlysis

  3. Opinion Spam Analysis is HARD! Whichofthesetwohotelreviewsisdeceptive opinionspam? The Affinia Manhattan is fantastic! My husband and I stayed there when we went to visit my sister. I loved the room. It was one of the best hotel beds we have ever slept in. The view was incredible. Manhattan is one of the most beautiful places I have ever been. The staff was very helpful as well. They had no problem going out of their way to be helpful. I would suggest this hotel to anybody! My husband & I stayed at the Fitzpatrick in early June 2004 for my birthday-great hotel! Location provides easy walking to Navy Pier, Marshall Field, Michigan Avenue & John Hancock. Room seemed spacious even though its only about 300 sq ft. Lots of room in bathroom; comfortable bed; very quiet, upscale hotel. We would definitely stay here again! DeceptiveOpinionSpam Anlysis

  4. OurData Sets1 •  400 truthful reviews – TripAdvisor.com •  400 deceptive reviews – Amazon Turk 1 Courtesy of Myle Ott Deceptive Opinion Spam Analysis

  5. 1) Prepare the Text • Lemmatize Text • Stop-word Removal • Gather Unigram, Bigram, Trigram Frequency Data • Use Relative-Frequency Ratios + T-Test Analysis to Produce (Feature, Weight) pairs What Are We Going To Do? Deceptive Opinion Spam Analysis

  6. 2) Train Classifiers Next Step • Baseline Classifier • Naive-Bayes • Support Vector Machine • Other? Deceptive Opinion Spam Analysis

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