I believe, although not 100% sure that you could retest her with the WISC IV once she turns 6. I would look for a psychologist that is very experienced testing gifted. I read on a thread that a good question to ask the psychologist is: About how many times have they had to use extended norms on the WISC IV? This will give you an idea if they know what extended norms are and if they have used them before. Then you could ask how long must you wait to give the WISC IV if DD was given the WPPSI.

We had DS tested using WPPSI by a local psychologist when he was 5 years 4 months, he hit several ceilings and we felt that we needed more information to better address his educational needs. So we had him retested in June when he was 6 years 8 months by someone who specializes in gifted, we had to travel and it was a lot more expensive, but the information we received was also a lot more comprehensive. This new report has already help us obtain a grade skip and further accomodations for his strengths and weaknesses in class. Eventhough it was a huge expense for us it has provided so much to information and recommendations such as, concentration issues, Occupational Therapy that we were not aware of.

The actual test result for DS between the WPPSI and WISC IV were not that different, a bit higher on the WISC IV, but the information we received from the second psychologist made all the difference.