A cross-sectional study is one in which ____________?
Correct answer: B. different age groups are tested at the same time
- A. the same people are retested over a period of years
- B. different age groups are tested at the same time
- C. different characteristics of a given individual are assessed at the same time
- D. the behavior of a group is assessed by different researchers
Explanation
A cross-sectional design compares different age groups or other groups at one point in time. Retesting the same people over years describes a longitudinal study.
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