Final answer:
A Registered Nurse with excellent skills derives power from expertise, which is based on specialized knowledge, contrasting with rational-legal, coercive, or legitimate power sources.
Step-by-step explanation:
An RN (Registered Nurse) with excellent assessment and psychomotor skills would most likely derive power on the basis of expert power. This type of power comes from having specialized knowledge or skills that others do not possess, allowing the individual to influence others based on this expertise. In this context, the nurse's ability to assess patients effectively and perform technical procedures skillfully gives them an authoritative advantage in the healthcare setting.
Rational-legal authority refers to power legitimized by laws, written rules, and regulations, such as those that govern nursing practice. However, this type of authority is different from expert power, which is rooted in an individual's personal skills and knowledge. Moreover, in contrast to coercive power, which is based on the ability to punish, or legitimate power, which is derived from one's formal position, expert power is not dependent on external factors but rather on intrinsic qualities and competencies.