Research categories

Types of public studies

Each category below describes the kinds of studies you will find in public registry listings and what to look for when reading them.

Publicly Recruiting Studies

Studies whose public registry record lists a recruiting status. Learn what the status labels mean and how often they change.

Research where volunteers are observed over time without being assigned a specific intervention. Often involves surveys or check ins.

Studies looking at ways to help people stay healthy, from lifestyle approaches to vaccines and screening methods.

Research on habits, routines, sleep, learning, and wellbeing. Many listings involve app based or remote participation.

Studies evaluating wearables, monitors, and other health devices. Listings describe the device type and what volunteers try.