Echo Chamber Formation (IMAGE) Dartmouth College Caption Partisan groupings evolve to become extreme, ultimately resulting in the formation of "echo chambers" in which political beliefs go unchallenged and increase in strength. Credit Illustration courtesy of Tucker Evans/Dartmouth College. Usage Restrictions Illustration courtesy of Tucker Evans/Dartmouth College. 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.