Part I of this study aims at showing our basic theory of "reflective practice in nursing" derived from Schon's theory. We used the theory derivation strategy described by Walker and Avant (1995). We ana­lyzed the principal concepts of Schon's theory and described them in relation to the nursing field based on analogies and attempted a theoretical expansion. The principal concepts were: "reflection-in-action". "reflection on-action", "function of reflection" and the stance required of reflective practitioners. "Reflec­tive practice in nursing" was characterized as an in-depth examination of issues arising during involve­ment with clients and the reframing of problem situations. Next, we analyzed the interrelationships between these concepts. and presented the framework of "reflective practice in nursing" and a practical model. The structure of the theory was clearly defined, and it allowed for many nurses to have insight to review their own practical cases.

　Another aim of this study was the evaluation of the usefulness of this theory in practical nursing cases, so the second part of this study shows some cases from this viewpoint.

　Part II of this study also aims at showing our basic theory of "reflective practice in nursing" derived from Schon's theory. However, it differs from Part I in that here we analyzed practical cases through fieldwork, and evaluated the potential application of this basic theory to the practice of nursing.

　The results suggested that : 1) nurses demonstrate three patterns of attitude in problematic situations. These cases could be evaluated and interpreted based on the framework of "reflective practice in nursing". 2) In all cases, reflection was introduced to nurses whereby nurses were to examine the meaning of a problem and their own attitude to it. In summary, the application of this basic theory to nursing practice will contribute to the growth and development of nurses and stimulate high-quality nursing care.

　Our next task will be to refine this theory and confirm its usefulness.