Gifted Issues Discussion homepage Forums Identification, Testing & Assessment How can I calculate GAI for WPPSI-IV?

We are thinking about applying for DYS for my DS5. His full scale is 144 which is not qualified. He is strong in block design, matrix reasoning, fluid concepts while relatively weaker in verbal and did not do well in processing speed test: cancellation. Our WPPSI-IV report did not provide GAI or non-verbal score which DYS require. Are there any ways to calculate GAI or non-verbal score for WPPSI-IV? I saw an online doc which shows instructions to calculate GAI for WISC-IV: Add the sum of scales for vocabulary, comprehension, similarity, block design, matrix reasoning, fluid concepts, and compare it to a table. Is it the same for WPPSI-IV? My son's sum of scales for the six items is 101. DYS also allows a non-verbal score. How is non verbal score calculated? Does it refer to the result of block design, matrix reasoning, fluid concepts? Thanks a lot.