To study the effects of age on adult memory, an investigator administers a memory test to a group of college students and then as soon as possible administers the same test to those students' parents and grandparents. The design of this study is best described as

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The design of this study involves comparing different age groups (college students, parents, and grandparents) at the same point in time, which is characteristic of a cross-sectional study.

To Study the Effects of Age on Adult Memory, an Investigator