The present thesis is trying to scrutinize why it is so difficult to put psychosocial conceptions into practice. I will investigate the specific field of nursing to look for aspects, which make it difficult or hinder an implementation. Central propositions are: (a) The care paradigm and its historical development, (b) nursing school, (c) personal resources and social skills of the nursing staff, (d) clinical conditions and (e) cases of patients' implementation blockages.