Researchers at Stanford University are conducting a neuroimaging study studying the effects of the hormone cortisol on brain functioning. Study participants will have a functional MRI and several test of emotional reactions and hormone reactions to mild stress. Participation is confidential. All study-related costs are covered by Stanford University. Participants who complete the study will be compensated $20/hr. If you are experiencing symptoms of Depression and are not currently taking antidepressant medication you may be eligible for the study. Leave us your contact information using this form https://redcap.stanford.edu/surveys/?s=3F7WCENPND to have us call you.