Interactive tool analyses recent tweets to create a user 's profile . ' witter is the most popular social media site in the world, and it has over 500 million users worldwide. Says Barack Obama is upbeat , while Katy Perry is depressed in tweets .
Interactive tool analyses recent tweets to create a user 's profile . 'Analyse words ' reveals a person 's emotional , social and thinking styles . Says Barack Obama is upbeat , while Katy Perry is depressed in tweets .