fMRI Test Graph (IMAGE) Rice University Caption Resting-state fMRI tests that measure neural activity by detecting changes in blood oxygen levels show negative correlation between flexibility and modularity in the brains of 52 subjects tested at Rice University. The researchers said understanding interactions between flexibility, which allows for better performance on complex tasks, and modularity, which indicates proficiency on simple tasks, will lead to a greater understanding of cognitive networks. Credit Rice University Usage Restrictions For news reporting purposes only. 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.