Finding treatments for mental health conditions doesn't just deal with people who live with them. Healthy volunteers play a critical part in the science of understanding our brains and behavior. But what qualifies as "healthy" can vary across labs and skew how scientists interpret study results. Dr. Joyce Chung, the Deputy Clinical Director at the National Institute of Mental Health (NIMH), is changing that. She is creating a pool of vetted volunteers to bolster the integrity, efficiency, and safety of mental health research.