Jim Davies, of Carleton University’s Institute of Cognitive Science and School of Computer Science, has a post on the Psychology Today blog that was selected as an essential topic. It describes his research done with Carleton Cognitive Science Ph.D. student Jay Jennings on how our minds use two different ideas of how objects move in the world–one for what we think, and another for how we act. People tend to think (incorrectly) that a ball emerging from a curved tube will continue to travel in a curved path, but when they try to actually catch the ball, they don’t make the same error.