In this study, investigators will examine the treatment effect of transcutaneous electrical nerve stimulation at auricular area with vagus nerve distribution on high-functioning individuals with autism. Specifically, investigators will choose two ear acupoints: heart and shenmen. Participants will be randomized to either 1 Hz or 20 Hz tVNS group (up to 5 times per week) for three weeks.
In this study, investigators will examine the treatment effects of transcutaneous electrical nerve stimulation with different stimulation frequencies on individuals with autism.