Chantal is interested in how the attitudes of children change over time. She intends to survey a
single group of students once a year as the children progress through grade school. What type of
study does she need to run?
A) longitudinal research B) cross-sectional research
C) single-strata approach D) sampling
Question 2
Gathering data from one stratum of the population of interest best describes
A) longitudinal research B) cross-sectional research
C) sampling D) single-strata approach