At a single point in time, researchers may test and compare the intelligence of members of different age groups. This bests illustrates a

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Quizplus · Accepted Answer

A cross-sectional study involves comparing different groups of people at one point in time. This is the best choice for the scenario described in the question. Longitudinal studies follow the same group of people over a period of time, heritability index measures the proportion of variation in a trait that can be attributed to genetics, and factor analysis is a statistical technique used to identify patterns in data.

At a Single Point in Time, Researchers May Test and Compare