Ellen Jane Langer (born March 25, 1947) is a professor of psychology at Harvard University, having in 1981 become the first woman ever to be tenured in psychology at Harvard. Langer studies the illusion of control, decision-making, aging, and mindfulness theory. Her most influential work is Counterclockwise, published in 2009, which answers the questions of aging from her extensive research, and increased interest in the ins and outs of aging across the nation.Bio from Wikipedia, the free encyclopedia. Photo by Robert Scoble from Half Moon Bay, USA (Ellen Langer) [CC BY 2.0 (http://creativecommons.org/licenses/by/2.0)], via Wikimedia Commons.