Steve and Michelle were desperate. Their 6-year-old son, Sam, was diagnosed with ADHD soon after entering first grade. Sam’s behavior seemed outright defiant: He ignored adults when his name was called and was in constant motion.  Sam let out bloodcurdling screams when forced to stop playing a game on the iPad. His teacher had struggled to manage similar behaviors in class, and his guidance counselor said Sam “needed to be on medicine.” Steve and Michelle weren’t so sure, but they wondered if they were being negligent by not putting him on Ritalin or something similar.