Studies that provided a blueprint for the Certified Neuroscience Registered Nurse (CNRN) examination were conducted in 1987, 1992, and 1997. In 2000, the American Board of Neuroscience Nursing (ABNN) formed a task force to re-examine the previous role delineation survey, obtain information to define current neuroscience nursing practice, and provide content validity for future CNRN examinations. Previous role delineation studies conducted by ABNN and a review of the literature provided the background for the study. The theoretical framework was the Nursing Intervention Classification (NIC) taxonomy and the methodology was a survey design. Computer Adaptive Technologies, Inc. (CAT), assisted the task force with survey development and data analysis. The survey, a three-part questionnaire, was mailed to 1,505 CNRNs and returned by 453 participants.