Study of Neurological Process (IMAGE) Spanish Foundation for Science and Technology Caption The researchers used numbers that visually resemble letters (1-I, 5-S, 7-T), and then they replaced them. Credit Elebilab Usage Restrictions None 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.