Which of the following is true of longitudinal studies?
A)They measure units from a sample of the population at only one point in time.
B)They are often described as "snapshots" of the population.
C)They include "sample surveys."
D)They are prevalent in marketing research, outnumbering cross-sectional and causal studies.
E)They repeatedly measure the same sample units of a population over a period of time.

Question

Quizplus · Accepted Answer

Longitudinal studies involve repeatedly measuring the same sample units of a population over a period of time. Option A describes a cross-sectional study, while option B is a characteristic of a single time point study. Option C is a broad term that could apply to any type of study. Option D is not accurate as the prevalence of longitudinal studies depends on the research area, and cross-sectional and causal studies are also widely used.

Which of the Following Is True of Longitudinal Studies