Check out this great TED talk from Dan Ariely about human decision making. I personally love this kind of research. Though it can be a little disconcerting, it's fascinating to learn about the brain and how we're not always in as much control of our perception as we think.
Dan Ariely is a behavioral economist and the author of Predictably Irrational. From a presentation design standpoint, his talk is a perfect example of how a data-driven speech can be made captivating when combined with the magic ingredients — 1) good storytelling, and 2) visual slides.
Dan is one of these rare academics who bridges the gap between academia and the general public. His research is cutting edge in the scientific community, and he is able to share it (both writing and speaking) in a way that engages just about everyone.
I've had a chance to hear Dan speak in person several times and can say his presentations are always crowd pleasers. Enjoy!