Chicago: University of Chicago Press. But professionals specializing in developmental psychology characterize this time period quite differently, and research supporting the evidence of midlife crisis simply doesn't exist.
Developmentalists study how personality affects people's lives, and try and identify the traits that lead to healthy or unhealthy behaviors and attitudes.
Physical Changes For those in middle adulthood, aging is inevitable. Developmentalists categorize this life stage as people between ages 35 to 64, and they maintain that healthy and unhealthy lifestyles and attitudes are the main concerns for those in this age group. This means that many in midlife are at the height of their careers, which also means increased job responsibilities.
For those who divorce and remarry, many report satisfying intimacy although most report that remarriage brings a new set of challenges. New York: Wiley. On the other hand, crystallized intelligence, or the stored knowledge gained from experience and education, becomes higher as people age. One hundred years ago, life expectancy in the United States was about 47 years.
Becoming grandparents. Introduction Middle adulthood or midlife refers to the period of the lifespan between young adulthood and old age. Internally, changes are taking place as well, with some decline in the major organs, including the lungs, heart and digestive system; additionally women undergo menopause sometime between the ages of 42 and