 UCLA researchers looking for healthy individuals aged 35-50 who have a home computer with internet access, are not pregnant, planning to become pregnant, or currently breastfeeding if female, to participate in a study investigating whether real-world experiences alter the brain and body. This study takes place over an eight week period and involves providing the names of 8 close friends or family members, completing a neuroimaging session, providing blood and saliva for genetic analysis, and a 6-week period in which participants login twice a week to complete online questionnaires. Compensation is up to 210 for those who complete all aspects of the study. Please email for more information. 