From the author: The article was published in: “Pedagogy and psychology: theory and practice of current research.” Materials of the international scientific and practical conference. (m. Lviv, 1-2 chervenya 2012). – Lviv: “Lviv pedagogical sleep.” 2012 – 112 p. pp. 9-12.PRACTICAL ILLUSTRATION OF THE DIAGNOSTIC PROCESS IN THE LINE OF TRANSACTIONAL ANALYSIS By diagnosis we understand the process of collecting information, classifying it in the therapist’s head so as to determine the general plan of therapy [4, p.62]. Whatever theoretical direction the specialist chooses, effective and conscious work is possible only if the client’s personality is diagnosed [13, p.111]. Transactional analysis, as one of the dynamically developing areas of psychotherapy, has created its own diagnostic system, containing many self-sufficient diagnostic categories. In contrast to the traditional clinical approach, developed mainly within medicine, the language of transactional analysis is easier to understand for a wide range of specialists familiar with the basic principles of the method [2]. This paper will present a fragment of the analysis of a client case, outlined earlier in the examination paper within psychotherapeutic training program. The examiners were Gusakovsky V.E., vice-president of the international association for transactional analysis, trainer and supervisor of TA, and Bulgakova E.G., certified transactional analyst. One of the most popular diagnostic categories is ego states. In our case, when analyzing functional ego states, pronounced Controlling Parent and Adaptive Child were identified [4, p. 24]. We also identified a number of contaminations - erroneous perceptions of the Child or Parent ego states as the Adult ego states [4, p. 25]. The therapeutic effect in transactional analysis usually begins with decontamination, that is, the cleansing of Adult thoughts and assessments of reality from Parental prejudices and Children’s illusions [4, p. 196]. In our example, the contaminations were as follows: 1. “If you don’t know how to do something, then it’s better not to take it on.”2. “A man should be able to do everything around the house.”3. “A woman must make decisions.”4. "I'm clumsy"5. “You need to control feelings” Also in transactional analysis, attention is paid to the study of parental instructions (prohibitions) and counter-orders (drivers), which can be schematically reflected on the scenario matrix [4, pp. 47-49]. Our client inherited from her mother the instructions “Don’t feel”, “Don’t be close”, “Don’t do”, the program “If you don’t know how, don’t try” and the counter-instruction “Be perfect”. In the process of upbringing, the father broadcast the order “Don’t grow up”, the program “Listen to your mother” and the driver “Please others”. The next diagnostic category is the stroking profile. Stroking is one of the key concepts of transactional analysis [3, 10]. Compiling a stroke profile comes down to identifying the client’s tendency to give, accept, ask for and refuse positive and negative strokes [9]. In our example, the client often gives positive and negative strokes; often accepts negative ones, rarely positive ones; does not ask for positive ones at all, but often asks (unconsciously) for negative ones; sometimes refuses positive strokes and never refuses negative ones. The next step in transactional-analytic personality diagnostics is the determination of the client’s personal adaptations [8, 12]. Our client uses several types of personality adaptations. Outwardly, she demonstrates a hysterical type, since she carefully monitors the attractiveness of her image and one of her main parental drivers is “please others” [4, p.277]. During the establishment of the therapeutic alliance, the main area of ​​contact turned out to be thinking and the driver “be perfect” appeared, which pointed out to us the obsessive-compulsive adaptation inherent in the client in many life situations [4, p. 330]. In emotionally significant and traumatic situations, passive behavior often manifests itself, thoughts begin to, 2010.