A researcher is interested in how self-esteem varies across the lifespan and decides to conduct a survey comparing people of different ages to address this issue. He recruits participants to be in one of four different age groups: 20 to 29, 30 to 39, 40 to 49, and 50 to 59. He has them complete a self-esteem survey, and then analyzes the data to see whether any patterns emerge. This study would be considered an example of a:

Question

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This study is a cross-sectional design because it compares different age groups at a single point in time.

A Researcher Is Interested in How Self-Esteem Varies Across the Lifespan