M.B.
Children who are suspected of having ADHD/ADD by their parents or the schools are often sent to their pediatrician/family doctor for diagnosis and/or meds. They may even be sent to a psychiatrist or a generalist psychologist. In either case, these doctors are going to do a very short assessment, maybe including a questionaire from the teacher/parents and then give their diagnosis. I think this is part of the problem with the over diagnosis and misdiagnosis. I would strongly recommend the parents seek the expertice of a child neuropsychologist. A qualified and specially training neuropsychologist will do a full day assessment using paper and pencil tests as well as interviews with the parents/child and questionaires from the teacher. Such an assessment can get you a lot further in reaching the appropriate diagnosis as well as generating specific recommendations based on your child's needs. Unfortunately, such assessments are usually not as fruitful with kids under 5 or 6 years old, they are just too young.
An important additional issue to keep in mind is that there is often times more than one issue facing the child (learning issues) when they get a diagosis of ADHD/ADD.
A little about myself, I am a almost done with my doctorate in community psychology and have 4 kids (10, 7, and 5 yr old twins). We just moved to Albuquerque from Chicago. My oldest son has ADHD and has been taking Concerta for 4 yrs. He does absolutely great but the dose has been adjusted a couple times. My husband is a neuropsychologist.
M.