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Northwestern University School of Law, Chicago, Illinois; American Bar Foundation, Chicago, Illinois ~Howard J. Trienens Professor of Law and Professor of Psychology; Research Professor. Leading empirical researcher on legal decision-making with extensive publications in law reviews and behavioral science journals. Studies of sentencing, jury selection, expert testimony, scientific evidence, and influence in the jury room (based on actual jury deliberations) demonstrate how crucial situational characteristics can impair or enhance legal decision-making. Work has influenced sentencing policy and has been used by courts in decisions involving juries and survey methodology, including cases decided by the U.S. Supreme Court. Author of the Reference Guide on Survey Research in the Federal Judicial Center's Reference Manual on Scientific Evidence (3rd ed., 2011), which led courts to set higher standards in analyzing survey results. As a member of the American Bar Association's American Jury Project, helped draft the Principles for Juries and Jury Trials, which were adopted in 2005. Served as President of the American Psychology-Law Society, Editor of the Law & Society Review, and as an advisory board member of the National Science Foundation.~