Distributions of Psychological Stress in the United States from 1983, 2006 and 2009: Sex (image) Carnegie Mellon University Share Print E-Mail Caption Until now, comparing stress levels in individuals across the United States over time was not possible due to a lack of historical data that tracks stress using accepted comparable measures. New research from Carnegie Mellon University's Sheldon Cohen and Denise Janicki-Deverts used telephone survey data from 1983 that polled 2,387 US residents over the age of 18 and online surveys from 2006 and 2009 that polled 2,000 American adults each. All three surveys used the Perceived Stress Scale (PSS), a measure created by Cohen to assess the degree to which situations in life are perceived as stressful. In all three surveys, women reported more stress than men. Credit Carnegie Mellon 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.