Can anyone help to explain how full-scale IQ is calculated from the subtest scores or Verbal/Performance summary scores in WISC III? I’ve been given the above but not the full-scale IQ for my son who has a language disorder.
Re: WISC IQ scores
that’s how I would have expected it to have worked but my son was given a verbal score of 75, a performance score of 81 but a full scale IQ of only 75. The overall scores for verbal or performance don’t seem to be an average of the individual sub-test scores so maybe its more complicated?
WISC IQ scores
Add up the sub-test scores in each catagory. It SHOULD add up to the score your child got in that area. If it doesn’t, something is wrong with their math.
Re: WISC IQ scores
These test are normd standardized in very complex formulas. The WISC has lots of research based on its ability to compare scores to others. There are charts to get the scores and may depend on subtest scores. Just remember that lots of research went into standardizing this test .
most people will have a score between 85-115. Rember IQ test do not show how smart one is, but can help predict how well a one will perform in school.
Re: WISC IQ scores
Spedie is right. Remember that gifted children with learning disabilities can appear average on IQ tests.
Subtest scores may be the most important part of IQ tests in these instances.
Also, as one website put it, what help is an overall score in the case of the rabbit who runs really fast, but can’t swim? Isn’t it most important to learn that the rabbit is a gifted runner, rather than an average overall athlete?
For many reasons, the person who administers the IQ test is the key to getting an adequate indication of your child’s abilities.
I would ask the test administrator for clarification and explanations.
Take the score from Verbal, add it to Performance, divide by 2, you have the average which is the full scale IQ score.