The development of children ages 12 through 18 years old should include expected physical and mental milestones. During adolescence, young people go through many changes as they move into physical maturity. Early, prepubescent changes occur when the secondary sexual characteristics appear. The sudden and rapid physical changes that adolescents go through make adolescents very self-conscious.
Physical Development in Early Adulthood | Lifespan Development
Age clocks, or the internal sense of timing of physical and social events, determine the various life stages through which adults pass. Although people age at different rates, the majority of Americans, reinforced by social norms, pass through a series of predictable periods. According to Levinson, the ages of 17 to 45 encompass early adulthood, which he divides into the novice phase 17—33 and the culminating phase 33— The culminating phase 33—45 consists of the settling down 33—40 and midlife transition 40—45 stages.
Stages of Adolescence
NCBI Bookshelf. This chapter provides a foundation for the remainder of the report. It summarizes current knowledge regarding young adulthood as a critical developmental period in the life course; highlights historical patterns and recent trends in the social and economic transitions of young adults in the United States; reviews data on the health status of the current cohort of young adults; briefly summarizes the literature on diversity and the effects of bias and discrimination on young adults' health and well-being; presents the committee's key findings and their implications; and enunciates several key principles to guide future action in assembling data, designing research, and formulating programs and policies pertaining to the health, safety, and well-being of young adults. Many of the topics summarized in this chapter are discussed in greater depth in subsequent chapters.
Network Connection Required to View this Feature. Section 1, Article 1 - By the time that individuals are to years-old, their physical bodies have reached maximum growth. Emerging adults are as tall and strong as they are ever going to be.