Paul Ekman, the psychologist behind the science on the popular TV show "Lie to Me," will deliver the annual Kenan Distinguished Lecture on emotion, expression and deceit on Thursday, April 12 at Duke University.The 5:30 p.m. lecture, "When, Why, and Should We Lie: The Science behind 'Lie to Me,'" will be held in the Fleishman Commons of Duke's Sanford School of Public Policy. The event is free and open to the public.Ekman's work in psychology and facial expression is the basis behind the TV show and the main character is loosely based on him.In 1991, Ekman was awarded the Distinguished Scientific Contribution Award, the American Psychological Association's highest award for basic research. In 2001, American Psychological Association named him one of the most influential psychologists of the 20th century. And in 2009, TIME Magazine listed him as one of the top 100 most influential people of that year. Also, he has written numerous books, including "Telling Lies and Emotional Awareness," co-authored with the Dalai Lama.The annual Kenan Distinguished Lecture series, established in 1997, brings a distinguished speaker to campus to address moral issues of broad social and cultural significance. Past speakers have included Nobelist Amartya Sen, Pulitzer Prize-winning journalist William Raspberry and noted author and public intellectual Ian Buruma.For more information, visit kenan.ethics.duke.edu.