Knowledge and skill in performing support duties for complex diagnostic tests and/or specialized practices or procedures, which includes preparing the patient and assisting in the diagnostic examination, preparing, and handling specialized instruments or other specialized equipment, and monitoring the patients condition before, during, and following the procedure. (Experience must demonstrate the ability to acquire the knowledge and skills to perform the work of an NA); OR one year above high school with courses related to the NA occupation; OR completion of an intensive, specialized, occupation-related course of study of less than one year which resulted in attaining certification as a nursing assistant may also meet in full the experience requirements for GS-3.