Mining Opinions from Reviews. Aditi S. Muralidharan Summer Intern Dept. of Computer Science, UC Berkeley. Dig. A walk-up-and use task-centered product browsing interface. (any product, not just cameras). Dig Demo. too many to read. too much to analyze. Star Ratings?. Reviews.
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(any product, not just
Which words are product features?
camera has _____
the _____ of this camera
it features a _____
Seed featuresPattern-Based Information Extraction
takes advantage of all available resources
Which words are opinion words?
HITS(“camera” NEAR adj) x HITS(“camera” NEAR great)
WebPMI(adj, great) =
WebPMI feature vector
known-polarity adjectivesClassifying Opinions
F1 Scores: 0.78(+) 0.76(-)
polarity pEstimating Product Feature Scores
observed polarity w