Experienced Psychologist

Not infrequently, I get calls from people wanting an ADHD evaluation. These tests are targeted to a single diagnosis. Most commonly, the caller has self-identified as having ADHD. The great publicity surrounding ADHD makes it an easy self diagnose.

Mental health practitioners sometimes specialize. They wil declare they are experts on autism, or eating disorders, or obsessive-compulsive disorder. I don't really think that is a great idea, though.

Psychology over the decades

I have given multiple psychological evaluations for Department of Defense Consolidated Adjudications Facility in reference to security clearances.