Semantic Analysis of Movie Reviews for Rating Prediction

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Presentation transcript:

Semantic Analysis of Movie Reviews for Rating Prediction CS 224N Laureen Lam

Project Overview Problem Description Applications Related Work: Thumbs up? Sentiment classification using machine learning techniques, by Pang & Lee Solution Steps: Data Classifier Training / Testing with Features Results Future Work

Solution Steps Data: http://www.cs.cornell.edu/people/pabo/movie-review-data/ Polarity Dataset v2.0 (+ / - sentiment ratings) Scaled Dataset v1.0 (0-, 1-, 2-star ratings) Classifier: Modified MaxEnt Training / Testing: 80 / 20 split of datasets

Polarity Dataset Results

Polarity Dataset Results

Scaled Dataset Results

Scaled Dataset Results

Comparison to Pang & Lee

Future Work Combine MaxEnt with other classifiers Decision Trees SVM Layer classifiers Spread feature sets among MaxEnt classifiers (serial or parallel pipeline) Use top-level classifier to combine results