How is AD/HD diagnosed?

The diagnosis of AD/HD is based on the Diagnostic Statistical Manual 4th Edition (DSM IV) diagnostic criteria. Some assessment scales, such as the Conner Scales, and others, may be helpful in the collection of the diagnostic behavioral features, required or suggestive for the diagnosis of AD/HD.

In simple terms, all four of the following diagnostic criteria must be met for a diagnosis of AD/HD to be established:

1. Some suggestive symptoms must be present for 6 months or more [as indicated on the AD/HD symptoms questionnaire or the DSM IV criteria].
2. Consistency between home and school (presence of difficulties or symptoms in more than one environment)
3. Onset of symptoms before 7 years of age
4. The presence of a severe or a significant impairment in function (academic, behavioral, social, self esteem or vocational)

A more detailed understanding of the above criteria is provided by reading and understanding the DSM IV criteria.