Posts Tagged ‘cluster randomization’

Ten Ways Bias Creeps into Randomized Studies

July 30, 2021 — Improving health through nutrition is important. Relieving the considerable suffering that obesity causes is likewise important. But both of these tasks are difficult. That’s because clear evidence for cause and effect is hard to find in nutrition and obesity. Randomized studies are hard. Observational studies are more common, but they are subject to bias from […]

Fathers and Daughters, Exercise, and Scientific Rigor

December 29, 2019 — Can fathers have a significant effect on physical activity in the lives of their daughters? This is an important question. Because right now, girls entering secondary school often don’t have fundamental movement skills that predict lifelong physical activity. Though we have plenty of data to say that fathers more often participate in physical activity with […]

The Cluster Fuss Continues with Two New Studies

February 1, 2019 — We keep hoping that editors and reviewers of obesity, nutrition, and physical activity studies will use a sharper eye when a cluster randomized trial comes to them. But two new publications tell us we can’t count on it yet. In both papers, the researchers claim to have proven the effectiveness of their programs. Yet neither […]