Hi N.,
In a previous post, you mentioned you were going to pursue a neuropsych eval (which is what I'd want to do at this point also based on the info and questions you've posted previously about concerns re a possible LD). If you're considering a neuropsych, I'd wait and go with whatever is included in the neuropsych.
Re WIAT vs WJ-III they are both fairly comprehensive and include mostly similar assessments. What I see as the strength of choosing one over the other is the potential for combining the achievement test results with ability test results when the ability and achievement assessments are given at the same time. If your ds is given the WISC, having the WIAT will allow grouping achievement vs ability subtests together in a way to illustrate strengths and challenges, same for WJ-III Tests of Cognitive Ability paired with WJ-III Tests of Achievement.
Re timing, I think you have to wait one year to test again, but there is a second version of the WJ-III Achievement tests (called something like a "Form A" vs "Form B") that can be used to get around the waiting-one-year requirement.
Are you hoping for higher scores for gifted advocacy or wanting info that will help further with understanding whether or not there is an LD? Or both?
polarbear
