![]() For this reason, cross-sectional studies are useful for research studies that are time-constrained, where insights are needed quickly, or where there are financial limitations. What is Cross-Sectional Study Cross-sectional study is defined as an observational study where data is collected as a whole to study a population at a single point in time to examine the relationship between variables of interest. In contrast, the cross-sectional approach only requires the researcher to capture data from the sample at a single period in time, and research findings are potentially available as soon as data collection ends. Furthermore, depending on the length of the data collection period, it may be some time before the research findings are available. Both of these activities are costly, both in terms of finance and time. Longitudinal studies require tracking the same individuals over a certain length of time, and it may be necessary to obtain very large sample sizes in order to accommodate sample churn that will naturally occur over the time period of the study. Perhaps the greatest advantage of this approach is that cross-sectional studies can be undertaken quickly and relatively inexpensively, especially when compared to longitudinal studies. ![]()
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