You may be eligible to participate in mental health research if you are 35-55 years old and are medically healthy. Georgetown University researchers in the Laboratory on Social and Affective Neuroscience are seeking healthy adults to participate in a research study investigating the relationship between certain social behaviors and brain activity. Participation may include behavioral observation, brain imaging using MRI scans, and interviews. Qualified participants may be paid $20 for an initial online screening and $150 for laboratory testing that includes computer tasks and a brain scan. For information, please email: LivingDonorStudy@Georgetown.Edu or call: (202) 687-6853