Christopher Chabris and Daniel SimonsChristopher Chabris is an associate professor of psychology at Union College and Daniel Simons is a professor of psychology at the University of Illinois. Chabris and Simons co-authored The Invisible Gorilla: And Other Ways Our Intuitions Deceive Us (2010).

PHOTOS: (LEFT) MATT MILLESS; (RIGHT) COURTESY DANIEL S. SIMONS