Submitted for Publication: March 24, 2011; final revision received July 7, 2011; accepted August 16, 2011.
Financial Disclosure: None reported.
Funding/Support: This study was supported by grants 1R01MH089626, U24MH081810, and 1K99MH085099 from the National Institute of Mental Health and the UCD MIND Institute.
Additional Contributions: Lou Ann Barnett, PhD, Lesley Deprey, PhD, Cynthia Zierhut, PhD, Kateri Ross, BS, Susan Rumberg, MA, Jacqueline Nguyen, BS, Parisa Shoja, BS, and Ashley Stark helped in the logistics of family visits and data collection. Evan Fletcher, PhD, provided technical assistance. Katie Camilleri, BS, Cherie Green, BS, Kayla Harrington, BS, Aaron Lee, BS, Sarah Liston, BS, Deana Li, BS, Carolyn McCormick, BS, Sharada Subramanian, BS, Sarvenaz Sepehri, BS, Mark Shen, MA, and Christy Rossi, PhD, assisted in acquiring MRI data. We especially thank all the families and children who participated in the Autism Phenome Project.