What's the Difference Between a Letter and a Number?

Emily Chang: You've done some fascinating work looking at how our inner drives and motivations can shape what it is that we see. I remember this really funny experiment you did with David Dunning many years ago, where you asked people to see the difference between the letter 13 and the capital letter B in an experiment. Do you remember that study and what it showed? Sure. We took this simple line drawing, think of a capital letter B, and if you sort of pulled apart the pieces, the straight line on the left and the bubbles on the right, their produces an ambiguity. Is it a B? Or is it sort of a smush together number 13? Now what we did was