Professor wong measured the intelligence and temperament of a group of preschoolers. he plans to follow the same group of participants over time and collect similar data when the children are in 3rd grade, 6th grade, and 9th grade. this is an example of which type of research design?

Longitudinal design

Explanation:

A longitudinal study is a type of observational research method in which data is collected for the same participants repeatedly over a given period. It can extend over the years.

Types of Longitudinal research: Cohort study and panel study.

Disadvantages:

1. Require a long duration of time.

2. Data is not a hundred percent reliable.

3. Require a large sample size.

4. Not cost-effective research.

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