In addition to all the other recommendations...
1) Be aware that "tests don't lie" is an incorrect statement. Test results are like statistics - they can be manipulated by the bias of the tester.
2) Not all tests are created equal.
3) Re-tests that are done close together (wisc-iv, for example, less than 3 years apart) are invalid
4) Trends are important - IF you can compare the same test (i.e. more than 3 years apart)
5) Details are important. The neuropsychologist should be given the DETAILED test results of all other testing done - not the "summary and recommendations", but the details - some will only release these directly to "other qualified personnel" (i.e. neuropsychs, ed. psychs, tdocs, etc.) - but either way, the neuropsychologist will need those.
Do you have a parent report? If not, do you know what all previous tests were, when done, and by whom? Really valuable info.
I'm not as familiar with neuropsychologist (we don't have access to that resource here) - so others can clarify, but if neuropsychologist doesn't deal with these directly, then you should also get (before the neuropsychologist appointment if possible)
- Speech Language Pathologist (SLP) (speech-language specialst) - they look at hearing, Central Auditory Processing Disorder (CAPD), spoken language, etc.; don't usually do a diagnosis but do provide very useful input to other specialists
- Occupational Therapist (OT) (occupational therapist) - if there is any hint of motor skills or sensory issues at all, these are a good source of parallel testing as well.
This sounds like a complex case - where there may be no one diagnosis that will drive the process, but where multiple diagnosis work against each other... you need to know what ALL the pieces are...