Learn more about the Preschool Study! Families who have previously participated in our infancy study are being asked to return when their children are preschool age to participate in a followup study. This study begins when a child is approximately 40 months of age (3 years, 4 months) and lasts through the child’s fifth birthday. During the course of this study, your preschooler will be asked to complete at Developmental Assessment, the Psychological Assessments, the Overnight P50, and the MMN. If you have not already done so during the infancy study, parents will be asked to take part in the Clinical Interviews and Blood Draws. Please follow the links above to learn more about each test. Parents will be compensated for their time spent participating in this study.