We intend to study adult patients with diagnoses of psychogenic movement disorders (PMD) seen by the Human Motor Control Section clinic (HMCS), patients with diagnoses of psychogenic non-epileptic seizures (PNES) seen by the Epilepsy clinic and healthy volunteers. The PNES patient group will include patients seen at Rhode Island Hospital. Additionally, we would like to study caregivers of patient's with PMD who are enrolled un protocol 07-N-0190.