She quickly took stock of his frantic mannerisms, the way his eyes darted anxiously around the room, and the distractibility and overexertion that defined his life, and took a guess at what the source of the problem was. “She asked me on, like, my second visit if I had ever been assessed for ADHD,” he says. “And when I did get tested, I was off the charts.” Before that moment, Leo had never considered it a possibility that he had ADHD.