This diploma thesis deals with the issue of left-handed retraining in the context of the research of Professor Miloš Sovák. It shows his contribution in this area and how he specifically contributed to the formation of teaching in the following years. The work is characterized by left-handedness, laterality. Examples of diagnostics of laterality of individual tests are given. In the theoretical part, the author also considers the breadth of the context of re-teaching not only the left-handed, where any violent re-learning can lead to consequences for life. In the practical part, a qualitative research was chosen, which is conducted on the basis of a semi-structured interview conducted with five respondents who answer open and closed questions about methods and approaches to their re-learning and their perception of the re- learning process. Research shows that there is no trait that is common to a smaller number of trainees, and therefore it is highly unlikely that there is a trait that would characterize a large group of trainees. However, given the research sample, it is not possible to draw a broader conclusion. KEYWORDS Milos Sovak, left-haned, retraining, reeducation, lavage, life story