<P> Adolescence is the period of life between the onset of puberty and the full commitment to an adult social role, such as worker, parent, and / or citizen . It is the period known for the formation of personal and social identity (see Erik Erikson) and the discovery of moral purpose (see William Damon). Intelligence is demonstrated through the logical use of symbols related to abstract concepts and formal reasoning . A return to egocentric thought often occurs early in the period . Only 35% develop the capacity to reason formally during adolescence or adulthood . (Huitt, W. and Hummel, J. January 1998) </P> <P> It is divided into three parts, namely: </P> <Ol> <Li> Early Adolescence: 9 to 13 years (preteen), </Li> <Li> Mid Adolescence: 13 to 15 years and </Li> <Li> Late Adolescence: 15 to 18 years </Li> </Ol> <Li> Early Adolescence: 9 to 13 years (preteen), </Li>

Physical psychological and social stages of development for a child