Longitudinal designs can be heavily influenced by subject attrition, if the research is not able to effectively retain participants over the course of the study.

Question

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Longitudinal designs require follow-up measurements over time, and if subjects drop out of the study, the results may not accurately reflect the population being studied. This is known as subject attrition and can significantly affect the validity of the results. Therefore, it is important to have strategies in place to retain participants throughout the study.

Longitudinal Designs Can Be Heavily Influenced by Subject Attrition, If