This is a the collection of software tools used for the project presented in the our project on Machine Learning, Sentiment Analysis, and Tweets: An examination of Alzheimer's Disease stigma on Twitter
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README.md

Twitter Analysis Package

This is a the collection of software tools used for the project presented in the our project on Machine Learning, Sentiment Analysis, and Tweets: An examination of Alzheimer's Disease stigma on Twitter

There are three components presented here. The tagging interface, the machine learning components, and the analysis tools.

The Tagging interface (./Tagging Interface)

This is the PHP, HTML, and JavaScript web application that we used to manually tag tweets to train the classifiers.

This user interface was used to organize raters and present Tweets for tagging, and to manage tag data. While we provide this implementation for reference, we would recommend exploring other options for the coding interface. The PHP tooling involved is somewhat over complicated, and difficult to maintain and debug.

A alternative might be Python combined with the Bottle web framework. Python provides more user friendly tools for managing the connection between the database and the user interface. This would also allow for direct integration of the machine learning tools and the tagging interface.

The Machine Learning components (./python)

This is the set of tools used to train, test, and produce output from the classifiers. It relies on a series of dependencies that are described in the ./python/requirements.txt

The Statistical Analysis (./R)

These are scripts used for checking the inter-rater reliability (icc) of our manual tags, and evaluating correlations between our tagged (or predicted results) and LIWC results over the same data.

Data

There is a placeholder SQLite3 database (./Tagging Interface/alz.db). We are not able to host this database publicly, contact us (oscarn@oregonstate.edu) for more information.

Tweets Scraping and Storage

We have not provided our twitter scraping tool. For those interested in producing their own tools, we would recommend looking at current twitter clients.

Accessing and navigating the Twitter API requires some technical knowledge of internet requests and transactional data formats such as JavaScript Object Notation or JSON; see Introduction to JSON for a primer (Lennon, J. et al., (2009), and storage and organization of collected Tweets requires experience with databases, or other suitable data management techniques. While we chose to use a relational database at the time due to technical constraints, more user-friendly non-relational data management options are now available such as MongoDB, Azure Tables, and others (Dirolf, et al., 2010; Calder, et al., 2011). Maintaining our relational database was challenging, particularly during the formative stages of our analysis. Relational databases rely heavily on predefined schema, and changes to the schema quickly become unwieldy. To minimize these difficulties, we recommend using a non-relational database option. Because MongoDB is designed to work with the JSON format that Twitter uses natively, it would be particularly well suited for this purpose.