Help us find out! Dr. Marco and investigators at the UCSF Autism and Neurodevelopment Program are recruiting boys between 8 and 11 years of age who have been diagnosed with autism, ADHD, or SPD. Interested parents can call or e-mail the program for a confidential phone interview. If selected, subjects can participate in diagnostic evaluation, cognitive testing, a non-invasive brain activity scan, and a Magnetic Resonance Image (MRI) of the brain. Participants will be compensated $20/session. We are also recruiting healthy control subjects! For more info, please call or email Shivani Desai at 415.640.2680 or firstname.lastname@example.org.