Age limits and psychological contents of stable period of adolescent age

The study of age limits and the content of the stable period of adolescence is described. The hypothesis is checked that the indicator of age-specific changes is the dynamics of adolescents' idea of themselves throughout time, the peculiarities of values and the internal conflict of values, the peculiarities of high school students' sense-of-life orientations. The results of empirical research related to appearance of new psychical formations and the peculiarities of critical and stable periods in adolescence and early youth are given.