Example of bar-tip limit error (IMAGE) Wellesley College Caption Sarah Kerns and Jeremy Wilmer’s revelation about bar graphs was made possible by a powerful new measurement technique that they developed. This technique relies upon having a person draw, on paper, their interpretation of the graph. Credit Jeremy Wilmer/Wellesley College Usage Restrictions Credit to Jeremy Wilmer/Wellesley College License Original 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.