TweetPsych uses two linguistic analysis methods, Regressive Imagery Dictionary (RID) and Linguistic Inquiry and Word Count (LIWC), to build a psychological profile of a person based on the content of his or her tweets compared to a baseline score based on over 1.5 million random tweets.
RID is a text analysis tool of 3,000+ words from 43 categories of cognition and emotion. LIWC is a text analysis tool that calculates the degree to which people use different categories of emotion and self-reference words.
