For information about ADHD:

              The Center for Disease Control and Prevention: 


The American Psychological Association: 

For information about autism spectrum disorders:

The Center for Disease Control and Prevention:

The American Psychological Associaton:


              Brigham Young University:

The University of Utah has an excellent website on the basics of genetics that may help you understand genetic studies better:


              and for information on possible genetic links between autism, ADHD, and depression, see: