Emerging research suggests that posts on the social media site Twitter can be a quick and inexpensive source of health information.

The posts have been used to map the outbreak of flu and now, a group of Johns Hopkins computers scientists say their techniques can gather important information about some common mental illnesses.

The technique involves a review of tweets from users who publicly mentioned their diagnosis. Experts analyze the tweets with the intent of discovering language cues linked to certain disorders, including depression, bipolar disorder, and post-traumatic stress disorder.

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