ADHD Word Cloud (IMAGE) University of Pennsylvania Caption In a Twitter-based study, Penn researchers found that people with ADHD tended to post messages related to lack of focus, self-regulation, intention and failure, and often used words like those in the word cloud above more frequently than the control group. Credit Sharath Guntuku and Lyle Ungar/University of Pennsylvania Usage Restrictions Must include credit as stated. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.