A major advantage of longitudinal design over the cross-sectional design is the ability to detect change as a result of repeated measurement of the same variables on the same sample.

Question

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Longitudinal designs track changes over time by measuring the same variables on the same sample at multiple points. This enables researchers to detect changes and examine patterns of development or growth. Cross-sectional designs, on the other hand, compare different groups at one point in time and do not provide information about change over time.

A Major Advantage of Longitudinal Design Over the Cross-Sectional Design