Adult patients with prolonged disorders of consciousness (PDOC), but who have not been diagnosed as Minimally Conscious or Vegetative State, will be recruited. All participants will be assessed using the Music Therapy Assessment Tool for Awareness in Disorders of Consciousness (MATADOC) standardized protocol. Assessment intervention will take place in four individual clinical contacts, over a 16 day period. Data will be collected using the MATADOC rating form and scored according to the MATADOC manual. Participants will concurrently be assessed with Coma Recovery Scale-Revised (CRS-R).