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Longitudinal Design Vs Cross Sectional Design

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In order to prove the theory that Masturbation causes gray hairs; A development research study needs to take place. This begins by determining which of the two basic developmental research designs that will be utilized; either a cross-sectional design or a Longitudinal Design ? Understanding, that longitudinal design allows for the study of the same participants, over multiple time points ; and considering that gray hairs don't show up over-night ; the best design would then be a Longitudinal Design . In addition, the design allows data to be measured over time, which in this case would be the number of gray hairs if any, that appear on our participants over the course of several years. Since we are measuring data
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