My main purpose in writing this blog has always been to continue exploring the reasons behind health behavior. I often say in talks about my theory that the question "why don't people take their medication?" led me naturally to the question "why do people do anything ?" In pursuit of that question, I had several blog posts this year on health behavior theory: a post on Lazarus and Folkman's theory of stress and coping ; a post on self-determination theory , which has become entwined in the literature with motivational interviewing techniques; a post on Leventhal's dual-process model of cognition and emotion, which was a source for Two Minds Theory; and a look at new developments in a popular health-behavior theory that I had previously critiqued, the theory of planned behavior . I was also pleased to share a guest post by my colleague Dr. Britt Ritchie, who shared an example of Two Minds Theory in her evolving understanding of her own public-speaking a...