Identifying the features of interoceptive vocabularies in sick and healthy people. <...> Interoceptive vocabularies or words that people use to describe their inner sensations diff er in somatic, psychosomatic, mentally sick and in healthy people. <...> The diff erences concern as volume of interoceptive vocabularies as their categorical structure. <...> Healthy people have smaller volume of interoceptive vocabulary. <...> Long experience of illness can decrease the volume of interoceptive vocabulary. <...> The results of the conducted research allow assuming that interoceptive vocabularies diff er in patients with various diseases and in healthy people. <...> Interoceptive vocabulary characteristics can play a role of a diagnostic tool. <...> Researchers usually study interoception within the bounds of neuroscience – brain activity in the areas associated with interoception [1–3], often in connection with negative mental states (like depression and anxiety) [4], or with some psychical phenomena [5–7], or with pathological forms of behavior (like addiction) [8]; there are some studies of interoceptive aspects of pain [9–11]. <...> One of the approaches to research interoception can be a study of words that people use for their internal sensations. <...> Probably, a very important characteristic of an interoceptive vocabulary is its volume, quantity of diff erent words that a person uses for his inner sensations naming. <...> Do people with diff erent diseases diff er in total volume or in characteristics of the classes of their interoceptive vocabularies? <...> Therefore characteristics of an interoceptive vocabulary can be of some diagnostic importance, play a role of a diagnostic tool. <...> METHOD To study diagnostic possibilities of interoceptive vocabulary characteristics we conducted a pilot research with fi ve groups of adult respondents: “healthy” people (without any diseases revealed) (372 males, 18–38 years old), heroin addicts (153 males with experience of everyday parenteral drug use for no less than a year, 18–37 years old), patients with hypochondric schizophrenia (50 people, 20 males и 30 females, 28–48 years old), patients with hypochondriacal neurosis (50 people, 28 males и 22 females, 20–39 years old), cardiac patients (with myocardial infarction) (27 people, 22 males и 5 females, 42–70 years old). <...> Оригинальные исследования <...>