Lot of information is shared on twitter by a whole bunch of users and some times the information shared are personal. So some one decided to build a search engine which would carry out the Psychological profiling of the Twitter user. That search engine is TweetPsych and it is desgined by Dan Zarraella , a social and viral marketing scientist.
Dan’s taken two linguistic methods for unraveling the written word, combined it with the Porter stemming algorithm to reduce words to their base meaning, and created TweetPysch, a simple new service that derives a psychological profile based on a user’s last 1,000 tweets.
The site is using the Regressive Imagery Dictionary (RID) and Linguistic Inquiry and Word Count (LIWC) methods to analyze every character and return primordial, conceptional, emotional, and cognitive content.
Basically when you run tweetpsych on a user it provides two kinds of analysis
(1) Cognitive content (2) Primordial,Conceptual and Emotional Content.
I decided to run the tweetpsych on the founder himself danzarrella, Click here to see the results of his Psycholofical Profiling based of recent 1000 tweets from him.
Nice tool to do psychological profiling of people who follow you and people whom you follow 
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