Xiao Is Gathering Research on the Number of Meals People

Multiple Choice

Xiao is gathering research on the number of meals people eat.He gathers data about the number of daily meals eaten by 25 people at each of the following ages - 10,20,30,40,50,60,and 70 years - over the course of one week,and looks for developmental differences.What type of research design is Xiao using?

A) Continuous
B) Sequential
C) Cross-sectional
D) Longitudinal