Final answer:
Research shows that mortality rates increase during emerging adulthood, with factors such as accidents and violence being significant contributors to this trend.
Step-by-step explanation:
The research conducted by Park and others on the mortality rates of emerging adults indicates that mortality rates increase during emerging adulthood. Specifically, this research suggests that the mortality rates of emerging adults, which is the developmental period after individuals reach sexual maturity but before they fully assume adult roles, are higher when compared to the mortality rates of adolescents. These rates are influenced by factors such as accidents, homicides, and which are more common in this age group. To test hypotheses regarding mortality rates, researchers utilize various methods such as life tables, hazard analyses, and statistical assessments, and they often focus on phenomena such as birth rates and survivorship rates at different stages of life.