A researcher wishes to study developmental changes in the music people prefer to listen to. The researcher locates 50 people who are about 20 years old. She sends these people a questionnaire every year for the next 10 years asking about the types of music they prefer to listen to. This is an example of which type of design? a. Longitudinal b. nested c. cross-sectional panel

a. Longitudinal research

Explanation:

Developmental change is the process ofchange that occurs in human beings throughout development. 

Longitudinal research is a type of correlational research that involves looking at variables over an extended period of time. It is a study where in observational research method in which data is gathered for the same subjects repeatedly over a period of time.

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