Final answer:
Daniel Levinson's concept of mid-life crisis has been significantly revised and does not have widespread support or strong research backing. Perspectives, attitudes, and experiences can change with age due to social climates, as indicated by research on same-sex marriage. Longitudinal research is a powerful approach to understand development.
Step-by-step explanation:
Daniel Levinson's concept of mid-life crisis has been significantly revised in recent years.
While the topic has been hotly debated, there is no widespread support for Levinson's concept in the profession, and it is not supported by most research. Critics argue that it does not allow for the wide variation in the way people experience mid-life.
Research, such as surveys on same-sex marriage, suggests that perspectives and attitudes can change with age due to social climates. Longitudinal research, which follows the same individuals over time, is a powerful approach to understand development.