The dx of add/hd is extremely difficult in adults as there is no scientic method and because it is complicated by the high level of co-morbidity with depression, anxiety, Bipolar Disorder and very others. You may find the following articles at the URLs given below of assistance.
http://www.ncpamd.com/adultadd.htm
http://www.nimh.nih.gov/publicat/adhd.cfm
http://www.webink.net/Williams-Diagn...character.html