On watching this video, students should be able to: Distinguish between an observational and experimental study. Explain the main reason why a randomised experiment can if done well, be used as a test ...

Observational studies are critical tools in clinical research and public health response, but challenges arise in ensuring ...

Using the potential outcomes framework of causality, topics covered include research designs such as randomized experiments, observational studies, and so-called natural experiments. We explore the ...

The study design contains a potential for the above selection bias, but the researchers didn’t address this potential in the study. The researchers were unable to recruit the desired number of ...