Sample Essay on Lifespan Development and Personality in Adults Aged 18 to 40

Lifespan Development and Personality in Adults Aged 18 to 40

In living things, growth is vital because it indicates response to physical changes. This happens mostly to children who are undergoing mental and physical transformation. Evidently, adults are still going through the process of development but they encounter various factors. The purpose of this paper is to reveal aspects that affect growth among adults in the range of 18-40years.

Clearly factors that affect the physical growth of a person include environmental and genetic factors. Evaluating the environmental aspects, increase or decrease in height are the major aspects that affect physical growth. As a result, it leads to changes in the tone of skin and development of muscles. In addition, eating behaviors contribute to the change that takes place in this stage. For instance, individuals who feed on junk food grow fat, while those who eat less balanced meals loss weight.

Genetics also contribute a lot in physical growth, whereby obesity may be inherited from family members. Environmental and hereditary aspects also contribute to cognitive progress. For instance at 20s, individuals are creative and focus on careers.  At 35years, they reach the peak while at 40 years; they focus on achieving their goals (Caspi & Roberts, 2001). In addition, a variety of factors that arise due to environment changes affects morals, personality and social character among adults.

Based on Erickson’s theory, individuals aged 18-35 face increase in psychological and social changes. At this stage, majority of the youth fall in love and plan to settle for marriage. This theory further reveals that at 40, most of the adults focus on career and family matters. Conversely, Daniel Levinson’s theory depicts two stages that reveals moral growth, social and personality of adults. In this theory the first concept concerns the stable period that makes adults to indulge in vital decisions. The second notion is transition that marks the end and the start of a new life.



Caspi, A., & Roberts, W. (2001). Personality development across the life course: The argument for change and continuity. Psychological Inquiry, 12 (2), 49-66.

Czerwinski, S. et al. (2007). Genetic factors in physical growth and development and their relationship to subsequent health outcomes. Am J Hum Biol , 19 (5), 684-691.



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