Text classification

This block copes with the problem of text classification, the task behind sentiment analysis, and many other NLP frameworks. A series of examples and Python scripts illustrate how to implement different classifiers, from the Naive Bayes Classifier to Deep-Learning powered classifiers. Special attention is devoted to product review data.

Summary

Table

Filter

Sort

Materials

Available for this block

Release date

Decks

True

May 24, 2023

Quizzes

True

May 24, 2023

NLP application examples

True

May 24, 2023

Python scripts

True

May 24, 2023

Problem set

True

May 24, 2023

Case study

True

May 24, 2023

Open the circle: learn core NLP aspects

Get the decks & videos    ​

Intro to Sentiment Analysis

 5_1.pdf

5_1.mp4

Dropbox is a free service that lets you bring your photos, docs, and videos anywhere and share them easily. Never email yourself a file again!

https://www.dropbox.com/s/vsd10jusv1oycav/5_1.mp4?dl=0

The Naive Bayes Classifier

 5_2.pdf

5_2.mp4

Dropbox is a free service that lets you bring your photos, docs, and videos anywhere and share them easily. Never email yourself a file again!

https://www.dropbox.com/s/jliaoff7nh3yrky/5_2.mp4?dl=0

Sentiment Analysis with the Bayes Classifier

 5_3.pdf

5_3.mp4

Dropbox is a free service that lets you bring your photos, docs, and videos anywhere and share them easily. Never email yourself a file again!

https://www.dropbox.com/s/0157yafmxgayqj3/5_3.mp4?dl=0

Sentiment, Affect, and Connotation

 5_4.pdf

5_4.mp4

Dropbox is a free service that lets you bring your photos, docs, and videos anywhere and share them easily. Never email yourself a file again!

https://www.dropbox.com/s/qb56qc01wscktv0/5_4.mp4?dl=0

Test your learning

If you went through the decks, take a couple of questions to test your learning! (2)

NLP application examples

Using supervised machine learning for large‐scale classification in management research: The case for identifying artificial intelligence patents

Research Summary Researchers increasingly use unstructured text data to construct quantitative variables for analysis. This goal has traditionally been achieved using keyword-based approaches, which...

https://onlinelibrary.wiley.com/doi/full/10.1002/smj.3441

Using supervised machine learning for large‐scale classification in management research: The case for identifying artificial intelligence patents

https://onlinelibrary.wiley.com/doi/full/10.1002/smj.3441

A Method of Automated Nonparametric Content Analysis for Social Science

The increasing availability of digitized text presents enormous opportunities for social scientists. Yet hand coding many blogs, speeches, government records, newspapers, or other sources of unstruc...

https://onlinelibrary.wiley.com/doi/full/10.1111/j.1540-5907.2009.00428.x

Make things happen with Python

Off-the-shelf Python scripts

Text classification with PyTorch

Text classification with LDA features in scikit-learn

Training a custom affect lexicons (new material to be added)

Problem set

Classifying helpful and unhelpful IMDB reviews

Close the circle by analyzing a case study

Personality and digital personae