Dr. Halk is studying the influence of getting older on intelligence. He tests a group of first graders, a group of third graders, and a group of sixth graders. They are all tested in one day. This is an example of _______ research.
A) cross-sectional
B) longitudinal
C) mixed design
D) fixed effects

Question

Quizplus · Accepted Answer

Cross-sectional research involves comparing different age groups at one point in time, which is what is happening in this scenario. Longitudinal research would involve testing the same group of individuals over a longer period of time to see how they change as they age. Mixed design research involves combining different research methods, and fixed effects research is a statistical method used to control for individual differences in a study.

Dr Halk Is Studying the Influence of Getting Older on Intelligence