Final answer:
The nurse manager is demonstrating the critical thinking attitude of risk-taking by implementing a new peer evaluation strategy despite staff nervousness, showcasing a willingness to accept potential risks for the hope of improved practices.
Step-by-step explanation:
When the nurse manager implements the new peer evaluation strategy despite the staff's nervousness, she is displaying the critical thinking attitude of risk-taking. Assertiveness in driving change, even in the face of potential pushback, embodies the willingness to take risks for the potential improvement of practices. The nurse manager believes that the peer evaluation protocol will contribute positively to the team's performance despite the uncertainty and initial discomfort it may cause amongst the nurses.
It's important to note that while humility, accountability, and independent thinking are also valuable critical thinking attitudes, they do not directly apply to the resolve in implementing a potentially controversial change. Rather, the use of the new evaluation instrument demonstrates the nurse manager's acceptance of possible risks in pursuit of a greater good, which is a hallmark of risk-taking.