With empathy, compassion, and practical tools, a developmental psychologist and sufferer of Sensory Defensive Disorder (SD) sheds light on a little known but common affliction in which sufferers react to harmless stimuli as irritating, distracting, or dangerous We all know what it feels like to be irritated by loud music, accosted by lights that are too bright, or overwhelmed by a world that moves too quickly. But millions...