A group of people age 40 are compared to a group aged 70) This type of research is called:

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This is a clear example of cross-sectional research design as two groups of different ages are compared at a single point in time. Longitudinal research involves studying the same group of individuals over a period of time, while time-of-measurement research focuses on changes that occur in the same group of individuals over multiple points in time. Cohort effect refers to the impact of a common experience or event on a specific age group.

A Group of People Age 40 Are Compared to a Group