Final answer:
The nurse gathering data to support a new policy for visiting hours is advocating for evidence-based patient care by using research to inform changes for improved healthcare outcomes.
Step-by-step explanation:
A nurse who recognizes that the strict visiting hours policy on the pediatric unit is outmoded and gathers data to support a new, more liberal policy is taking on the role of an advocate for evidence-based practice. Evidence-based practice involves integrating the best available research with clinical expertise and patient values to facilitate optimal health outcomes. This nurse is collecting data and utilizing research, such as studies on nurse home visiting and its long-term effects on patient care, to inform the development of a policy that could lead to improved patient care and family satisfaction. The nurse's actions highlight the importance of being proactive in healthcare to ensure that practices continue to evolve with the latest evidence for the benefit of the patients.