Jon Krosnick is Professor of Communication, Political Science, and Psychology at Stanford University, Senior Fellow at the Woods Institute for the Environment, Director of Stanford’s Political Psychology Research Group, and Research Psychologist at the U.S. Census Bureau. He has expertise in questionnaire design and survey research methodology, voting behavior and elections, and American public opinion. He has taught courses for professionals on survey methods for 25 years around the world and has served as a methodology consultant to government agencies, commercial firms, and academic scholars. His recent research has focused on how other aspects of survey methodology (e.g., collecting data by interviewing face-to-face vs. by telephone or on paper questionnaires) can be optimized to maximize accuracy. He is a world-recognized expert on the psychology of attitudes, especially in the area of politics and co-principal investigator of the American National Election Study, the nation's preeminent academic research project exploring voter decision-making. For 30 years, Dr. Krosnick has studied how the American public's political attitudes are formed, change, and shape thinking and action. As an expert witness, he has evaluated surveys presented by opposing counsel and has conducted surveys to inform courts in cases involving unreimbursed expenses, uncompensated overtime work, exempt/non-exempt misclassification, patent/trademark violation, health effects of accidents, consequences of being misinformed about the results of standardized academic tests, economic valuation of environmental damage, change of venue motions, and other topics.