The present thesis shows a new culture of learning in the training of adults as psychiatric health care and nursing professionals, in which the focuses are patient orientation, self-determination in learning and reflective practice. The basic theoretical principles underpinning this thesis are the learning theories, particulary those concerning adults, the fundamental aspects of the psychiatric health care and nursing training and the theory of the portfolio concept. The function of the portfolio will be highlighted in more precise detail, its essential prerequistes, advantages and disadvantages described and the portfolio presented as an assessment tool. It is possible to establish, that the portfolio is suitable for use as a method or tool in psychiatric health care and nursing training. Portfolio work fulfils the requirements and basic didactic precepts oft he Ordiance of Training in Psychiatric Health Care and Nursing, as it promotes self-directed autonomy, personal responsibility, selfreliance, social learning, communication, tolerant behavior and active participation. In addition, it is useful for sensitising ones own personality. Portfolio work offers the possibility of assessing both the examination goals specified in the curriculum and the skills, that must be aquired. Assessment grids, in which individual achievements, features oft the learning process, learning targets and skills are described, are a help in this respect. This thesis makes it clear, that the use of portfolios means quality intenification in the training of psychiatric health care and nursing professionals.