A distinct advantage the longitudinal method has over the cross-sectional method is that

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The longitudinal method allows researchers to study the effect of early experiences on later behavior, which cannot be done with the cross-sectional method. This is a distinct advantage of the longitudinal method over the cross-sectional method. While the longitudinal method may be more costly and less flexible than the cross-sectional method, these are not necessarily advantages in terms of research validity. Additionally, the longitudinal method may still be vulnerable to cohort effects, although it may be less affected by them than the cross-sectional method.

A Distinct Advantage the Longitudinal Method Has Over the Cross-Sectional