My kids haven't taken the WIAT, so I'm not familiar with past knowing that it's a set of achievement tests. Re dysgraphia - you will see the impact of dysgraphia in any subtests that require a written response (including possibly math subtests). My dysgraphic has a very distinct pattern on the WJ-III Achievement subtests - subtests requiring verbal responses had scores near to his GAI percentage, subtests requiring a handwritten response (but untimed) had scores that were significantly lower, and subtests requiring handwritten response *and* timed were another SD (or more) lower across the board.
You might try googling "WIAT subtest descriptions" to find info on the subtests.
Best wishes,
polarbear
