Which of these research designs contributes the least to our understanding of the determinants to physical activity?

Question

Quizplus · Accepted Answer

Cross-sectional studies only provide a snapshot of a population at a single point in time and do not establish causality. They can only show associations between factors and physical activity. On the other hand, double-blind randomized cross-over trials and prospective studies can provide stronger evidence for causality and have contributed more to our understanding of the determinants of physical activity.

Which of These Research Designs Contributes the Least to Our