The MMPI

Does anyone know if the MMPI is used to diagnose Asperger's?

The MMPI is a personality test used to give mental health professionals an outside view of the patient's personality. When you're given the MMPI it is because psychologists are looking more for personality disorders and things like hypochondria. Nothing about it would really be useful in diagnosing Asperger's since it doesn't test the brain's development. To be properly diagnosed with Asperger's you'll need to be tested using the WAIS-III.