Speed dating Classification“What you should know about

dating”

Stephen CohenRajesh Ranganath

Te Thamrongrattanarit

Speed dating

• A rabbi invented speed dating 10 years ago• Here’s how it works…

• Goal : To find the model that predicts men and women’s decisions

Massive feature extraction

• Easy things• Word count• Count of certain

words• Backchannelling• Post-conversation

word count• Question count• Non-academic

discussion• Etc.

• Difficult things• Latent Dirichlet

Allocation• Latent Semantic

Analysis• Various vector

similarity metrics• Speed of

conversation• Etc.

Classifiers and other techniques

• Lexical Feature Extraction• Logistic Regression with linear kernel• Support Vector Machines with…

• Linear kernel• RBF kernel

Evaluation

• Principle Component Analysis• For every feature we add, we capture more variance.

= good sign

• The Rajesh Metric for evaluating models• Logistic Regression and SVM work just as well.

• Pick the best model based on the Rajesh Metric• Analyze regression coefficients of the best model

What you should know about dating

• Men are more likely to say yes if ..• More positive words are uttered. [lexical features]• Men and women talk about the same topics [Latent

Dirichlet Allocation and Jenson-Shannon similarity]• Men:women word count ratio is high• Women ask more questions! [count of question

marks]but opposite effect on women

• And more…

• Women’s decisions can hardly be predicted by the model. (Women are hard to understand…)• Women are more likely to say yes if they talk about

the past.• Physical appearance? Voice? Speech? Chemistry?

Acknowledgement

• Professor Dan Jurafsky (Linguistics Dept.)• Professor Dan McFarland (School of Education)• Stephan Stiller (Computer Science)• David Hall (Symbolic Systems and CS)