Medical research is essential for advancing the understanding of health, diseases, and treatments. There are many types of studies that serve different purposes. Medical research, or health research, ...

Pew Research Center is committed to meeting the highest methodological standards — and to exploring the newest frontiers of research. Learn more about the methods the Center uses to conduct objective, ...

Often divided into primary and secondary research, market research helps businesses identify key factors influencing their market, including the competitive landscape, target audience characteristics, ...

This article presents an overview of recent psychometric developments in the area of multimethod measurement, in which we argue that different types of research designs require different types of ...