Multiple Choice
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
Correct Answer:
Verified
Correct Answer:
Verified
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