Welcome to the Laboratory for Clinical and Developmental Studies, in the Counseling and Clinical Psychology Department at Teachers College, Columbia University. In this clinical psychology lab, we address practical questions about suicide and self-injury by applying methods from psychological science. We want to better understand why people hurt or kill themselves. We also seek ways to precisely and responsibly assess suicide risk. Our research pertains to both adulthood and adolescence, and aims to improve our understanding of suicide risk across the lifespan. We are happy to share with you our ongoing projects and past work and offer opportunities for more involvement.