Healthy Volunteers Needed Are you between the ages of 18 and 55 and in good physical and mental health? You may be eligible to participate in a research study needing healthy volunteers. Participants will be asked to complete questionnaires, computer tasks, behavioral assessments and a Magnetic Resonance Brain Imaging (MRI) assessment to obtain a picture of your brain. Compensation is provided. For more information, please contact The Positive Emotion & Anxiety Research Laboratory at (858) 366-3149.