Difficulty Processing Speech May Be an Effect of Dyslexia, Not a Cause (image) Carnegie Mellon University Share Print E-Mail Caption Carnegie Mellon University scientists investigated how procedural learning -- how we acquire skills and habits such as riding a bike -- impacts how individuals with dyslexia learn speech sound categories. Published in Cortex, Lori Holt and Yafit Gabay found for the first time that learning complex auditory categories through procedural learning is impaired in dyslexia. This means that difficulty processing speech may be an effect of dyslexia, not its cause. To do this, study participants played a CMU-developed video game. As an alien approaches in the video game, a sound from an associated sound category plays. Participants make shooting or capturing actions according to whether the alien is a friend or a foe. The four aliens have different colors, shapes and movement patterns. Credit Carnegie Mellon University Usage Restrictions None Share Print E-Mail 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.