The second, revised and expanded edition of the book (the previous one was published in 2001) is dedicated to one of the oldest ways for people to know each other - observation. The revival of interest in it is associated with the development of practical psychology, the success of which is often determined by the extent to which a practitioner masters observation techniques and the extent to which his professionally important quality is developed - observation. The book is addressed to specialists working in the “person-to-person” system. This is an excellent textbook for those who are studying the course “Observation and Observation”, mastering the professions of a psychologist, consultant, psychotherapist, teacher, doctor, investigator, manager.