I wouldn't necessarily worry about it - the WISC isn't really a very long test, it's just a string of relatively short subtests. I think a lot depends on the personality of the tester re how much time the test takes to administer. When my EG ds was tested on the WISC the first time he was 5 it was a WISC-only test given by a private psych for admission to a gifted program, and it was stretched out over two days, approximately 1-1.5 hours each session. The second time he was given the WISC he was 8 and the test was part of a comprehensive neuropsychology exam. DS went in to meet the neuropsych first thing in the morning, probably around 9 am. I was sitting waiting outside the testing room and thought of something I wanted to mention to the neuropsych about the previous IQ testing... so when ds came out at around 10, I mentioned it to her and she surprised the heck out of me when she let me know that "yep, we just finished the WISC and I saw that too". So that second test didn't take him very long at all. He's had a repeat WISC since then plus the WJ-III Cog Abilities test twice (once in a non-stressful situation and once in a relatively stressful situation) and his scores are extremely consistent with all of his testing.
Do you have the test results yet, and do they seem to match what you know about your child? Did you ask your ds what he did during the test? Did he seem happy about it or stressed out about it?
polarbear
