Adolescence is considered as a normal part of the human life span, connecting middle childhood and young adulthood. The adolescent years extend roughly from age 10 to age 22. It is common to mark the beginning of the teenage years as the entrance to adolescence; most people consider that the onset of puberty, or the beginning of sexual maturity, as a sign of an individual's passage from middle childhood to adolescence.
While the physical changes of puberty are an important indicator signaling adolescent development, many other kinds of changes also occur during the adolescent years; cognit…
