Adolescence is the period of transition, a distinct and dynamic phase of development in the life of an individual because during this period an individual is neither a child nor an adult. The inability to cope with the changes has a direct impact on adolescents' psychosocial health and development on interpersonal relationships. Stanley Hall (1844-1924), was the first psychologist to advance psychology of adolescence in its own right and to use scientific methods to study them. He defined this period to begin at puberty at about 12 or 13 years, and end late, between 22 years to 25 years of age. Hall also described adolescence as a period of "storm and stress."
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