Today I had a long conversation with a neuro-psychologist here. She explained, after asking for quite a bit of background and information, that neuro-psychologists cannot diagnose for ADHD before the age of around six. Before then the child does not have sufficiently developed capacities to be tested. She also stated (just to add to the confusion!) that one simply cannot speak of ADHD if there are no problems of attention/concentration. Is this a very different position to the States? Do neuro-psychologists there have diagnostic tools to measure pre-school children?