[Evidenced-based nursing: knowledge, performance and learning in nursing care].

As part of the nursing process, nurses choose an academically secured intervention in response to a patient's problem, implement it and evaluate it. "Evidence based" describes a learning and working method which has the advantage of being applied in real, professional problem situations. Not only the learner but also the professional nurse can improve their competencies for professional acting. Following the problem- and motivation orientated approach of Roth (1983), the implicit learning steps of this method can be illustrated. The implementation of evidence-based nursing can raise high expectations. However, there are also critical aspects connected to it that need further exploration.