One readily noticeable pathognomonic trait of autism is hand-flapping—a stereotyped motor movement that can look a bit like an attempt to accelerating the drying of nail polish. Not all with autism do ...

What's so unusual about a baby fascinated with spinning a cup, or a toddler flapping his hands, or a preschooler walking on her toes? Parents and even doctors sometimes miss these red flags for autism ...

Stimming is short for self-stimulation. It means doing the same movement, sound, or action again and again. Many people stim. You might tap your pen, bounce your knee, or twirl your hair. Many parents ...