Almost everywhere I go lately people are asking about autism spectrum disorders, their perceived increase, and whether any diagnostic tests other than behavioral observations exist. You may be interested in watching the TED India 2009 presentation by Aditi Shankardass PhD. She specializes in a groundbreaking Electroencephalogram or EEG diagnostic technology developed by Harvard University, which records and analyses the brain’s electrical activity in real time. This allows researchers to watch the child's brain as it performs various functions, detecting even the slightest abnormalities in these functions, and providing a more accurate and comprehensive clinical picture of the child's brain abnormalities than is available from primarily behavioral observations. According to Dr. Shankardass, results from these EEGs have been startling. More tomorrow.