Electrode Cap (image) Michigan State University Share Print E-Mail Caption A Michigan State University experiment found that learning a new task when rules change is surprisingly difficult. Study participants wore this electrode cap. Credit Michigan State 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.