The applicability of the researched issue is preconditioned by the need for detecting key determinants which define the process of the person's professional development, identification with the professional environment, and sources of professional self-efficacy. The purpose of the article is to provide the deliverables of the empiric research for the purpose of detection of an aggregate of professional values, internal conflicts therein and specific aspects of their displays in the course of professional establishment. The leading approach to the research has been an ascertaining experiment by means of standardised tools as well as approbation of the modified diagnostic technique which enables detecting essential aspects of internal conflicts and dynamics of their displays. The dynamic structure of professional values is analysed, and contents of the internal conflict and development thereof in the process of professional identity establishment are studied in the article. The article may be of use when developing processes of training and adaptation of young professions, determining professional reference points of production trainers and tutors in the course of vocational training.

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