These and other questions are being addressed by using a variety of techniques. We study the changes in cognition and behavior following specific brain damage and brain malformations in neurological patients; we record electrical activity from the brains of neurosurgical patients; we probe the behavior of people with neuropsychiatric diseases such as Autism Spectrum Disorders and Obsessive Compulsive Disorder. And we are investigating behavior and brain activations in healthy individuals, studies that include an examination of the differences between people in social cognition.