Hour 1: Just how strong is your willpower? According to our guest this hour, we all spend about four hours a day simply resisting temptation, so it pays to know. We’ll talk with Roy F. Baumeister who heads the social psychology program at Florida State University. Baumeister is also the co-author of the new book “Willpower: Rediscovering the Greatest Human Strength” (The Penguin Press, 2011).