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Julia Chelen is the Senior Research Program Coordinator II for the Johns Hopkins University Center for Advanced Modeling in the Social, Behavioral and Health Sciences in the Department of Emergency Medicine. Ms. Chelen received her B.S. in Decision Science from Carnegie Mellon University with a secondary major in Policy & Management. She joined the Center for Advanced Modeling in 2010, having been a research member of Dr. Epstein’s Center for Social and Economic Dynamics at the Brookings Institution. Formerly, Ms. Chelen focused on experimental decision research, specifically systematic irrationality, while conducting studies on evidence presentation, predictive accuracy, and predictive confidence with Professor Robyn M. Dawes at Carnegie Mellon University. Ms. Chelen’s research interests include quantification and modeling of human judgment, biological bases of decision making, and social cognition and attitude change. She is actively involved in research for Dr. Epstein’s Pioneer Award (Behavioral Epidemiology: Applications of Agent-Based Modeling to Infectious Disease). In conjunction with the Center Director, Ms. Chelen develops, generates, and manages Center research efforts, including funding proposals, research methodologies and analyses, and publications. She is currently studying with the Whiting School of Engineering Graduate Program.