Question

A team of researchers is studying the differences in whether there are stable individual differences in sleeping behavior at various ages. They decide to test 3-month-olds, 6-month-olds, and 9-month-olds all in the same week. What type of design are they using to examine this question?

Answer 1

Answer:

correct answer is cross-sectional

Explanation:

when a team researcher testy on different age group like 3 months old and 6 months old  and 9 months old  

so the type of design use is cross-sectional

because cross-sectional is an observational study

and it analysis data from a different age of the population at a specific point in time  so it is a cross-sectional method  

so correct answer is cross-sectional