A researcher is examining motor skill development by observing children at 18 months old,24 months old,and 30 months old.If the researcher uses a longitudinal design and obtains 20 scores for each age,how many children participated in the entire study?
A)20
B)40
C)60
D)cannot determine without more information.

Question

Quizplus · Accepted Answer

In a longitudinal design, the same participants are observed at different points in time. Since the researcher obtained 20 scores for each age group, it means the same 20 children were observed at 18, 24, and 30 months.

A Researcher Is Examining Motor Skill Development by Observing Children