Additional Study Information: Our research team studies the biological causes of depression and suicidal behavior. Our ultimate goal is to improve prevention of suicide. You may be eligible to participate as a healthy control if you do not have psychiatric illness. Participation involves clinical assessments, a week-long phone survey, a stress test, and computer games, with compensation of $250. If you also sign up for our neuroimaging study, you could receive up to a total of $1,250. Our rigorous safety protocols minimize the risk of COVID-19 exposure.