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#84295 - 09/03/10 01:49 PM wisc-iv vs gai score
kathy p Offline
New Member

Registered: 09/03/10
Posts: 1
My 12 year old son recently took the WISC-IV and has a FSIQ of 125. He scored: VCI 132, PRI 131, WMI 129, and PSI 78. In trying to find out how we might help him with his PSI, I ran into the GAI. His GAI is 138. Are we supposed to be using the GAI as his official IQ? Nobody at the school where he was tested knows anything about this.

#84298 - 09/03/10 02:23 PM Re: wisc-iv vs gai score [Re: kathy p]
keet Offline

Registered: 01/26/08
Posts: 215
Originally Posted By: kathy p
Are we supposed to be using the GAI as his official IQ?

What are you planning to use it for? If you're trying to gain admission to some kind of program, he will have to meet whatever the criteria are.

#84299 - 09/03/10 02:29 PM Re: wisc-iv vs gai score [Re: kathy p]
mich Offline

Registered: 07/18/10
Posts: 272
Hi Kathy,
I think to answer whether to use the GAI or FSIQ depends upon what the IQ score is being used for. Regardless of which you choose to use, he clearly is a very smart guy.

The GAI is a better measure of his reasoning and thinking ability by taking out his very low PSI and his very good WMI. The PSI and WMI are more associated with efficiency rather than what we often think of as true intellect. That said, deficits in these areas can impact school performance and should not be dismissed out of hand.

Given the spread between your son's scores, I am willing to bet that many evaluators would not report a FSIQ without at least mentioning the statistically significant difference between his PSI and other indices. These kind of spreads are very rare and give you important insight into his learning profile.

Did you have him tested in order to gain entrance to a gifted program? You post in the 2-E section and I wonder if he has any diagnosed learning disabilities or ADHD? Does he have any vision, visual integration or fine motor issues that may have contributed to his relatively poor performance on the PSI subtests?

When I see profiles like this, I like to compare it to a Ferrari with a very high powerful engine that is stuck in rush hour traffic. Sometimes kids with this profile have a hard time taking in new information quickly and or demonstrating their knowledge quickly and efficiently. Their intellect can be underestimated because they can't produce the output at the same rate as their peers.


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