“…Developing and measuring competencies are highly relevant issues in critical care nursing globally (Lakanmaa et al ., ; Williams et al ., ). Measuring competence as a broad concept is a complex task with many challenges (Flinkman et al ., ; Franklin and Melville, ); thus, there is a need to focus on concrete and contextual clinical skills (Windsor et al ., ). Measuring patient observation skills provides a concrete insight into CCNs' competence (Lakanmaa et al ., ), and information can be used in developing education and training.…”