Because participants of different ages in a cross-sectional study are from different cohorts,

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Cross-sectional studies only provide information on age differences, not on individual development. Since participants from different ages are from different cohorts, the study cannot follow the same group of individuals over time to observe their development, which is a disadvantage. Therefore, information about the development of individual children cannot be obtained using the cross-sectional method.

Because Participants of Different Ages in a Cross-Sectional Study Are