Recently a pediatrician phoned me with a concern about a three-year-old patient I see in my psychology practice. During a routine visit, the doctor said, “Karson” had bitten him. In fact, the young child had a history of behavior problems. “Do you think there’s a diagnosis?” the doctor asked me. I told her I wasn’t a fan of diagnosing toddlers. “What I can tell you,” I said, “is that he has strong reactions when people approach him too suddenly, loudly, or unexpectedly.” I was describing a phenomenon that I place
