We haven't retested dd11 although I do believe that her first WISC-IV was a bit of an underestimation (as did the tester) due to lack of cooperation from dd on the timed parts, especially block design. However, in our instance I don't think that she'd qualify for DYS & I don't know what benefit it would have for her.
With dd9, we did retest on the WISC-IV one year after the first testing and got a score that was 20 points lower. Her verbal was still quite high with a 19 and a 17 in there, but the other score was a 12, so overall 99th. The first set of verbal scores were 18, 18, 15, so a similar pattern with the third score being the lowest (just not quite as low as time #2).
Her first composite score would have qualified for DYS and the second was barely MG. Again, she doesn't have any other DYS level scores so I'm not pursuing testing yet again at this point.
