Medical research shapes healthcare every day, but not all studies are created equal. Knowing the differences can help you feel more confident reading health information online and understanding what ...

Clinical trials are well-controlled and designed experiments that aim to prove that an Investigational Medicinal Product (IMP) is effective. Clinical trial data is submitted to the national health ...

Pew Research Center designed this study to assess the current state of online survey sampling methods – both probability-based and opt-in – and determine their accuracy on general population estimates ...