Cross-sectional vs longitudinal time – UGC NET Question

A cross-sectional study captures data from a sample or several groups at a single point in time, providing a snapshot of the population’s characteristics or relationships among variables. It is commonly used in surveys to estimate prevalence or compare subgroups. Because it does not track changes over time, it is relatively efficient and economical. Therefore, the type of study described in the stem is known as a cross-sectional study.

Option A:
Longitudinal studies collect data from the same participants at multiple time points to examine change and development. They do not restrict data collection to one moment, so they do not fit the stem.

Option B:
Experimental studies involve manipulation of variables and control groups to test causality and can be cross-sectional or longitudinal in timing. The stem focuses solely on the single time-point nature of the design rather than on manipulation, so experimental is not the best choice.

Option C:
Option C, cross-sectional, accurately reflects the “snapshot” nature of the data collection described in the question. It may involve many participants at once, but only at one time point, which matches the stem.

Option D:
Panel studies are a form of longitudinal design in which the same individuals are followed over time; they explicitly contradict the single time-point characteristic mentioned. Hence, panel is not appropriate here.