Based on the types of studies there are, the following is true:
- Longitudinal study retests people overtime.
- Cross-sectional study compares different ages at the same point in time.
What is Cross-sectional research?
- Variables are compared at a certain point in time.
- When used on ages, people of different ages are compared at the same time.
Longitudinal research on the other hand is done to the same people over a period of time to see how they change.
Find out more on longitudinal research at https://brainly.com/question/25681723.
