Reply to What makes someone identify processing speed as being low?

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[quote=Anonymous][quote=Anonymous][quote=Anonymous][b]Any difference in WISC sub-scores that is greater than 15 points (aka 1 standard deviation) is considered "significant".[/b]   So your child has a sub-scores that are 2 standard deviations apart, which is quite significant.

This means that the FSIQ is not an accurate representation of intelligence.  The person who did the testing should have considered whether to compute a GAI instead.

Basically, the significant difference between the subscores means that the IQ is an artificially low representation of intelligence (maybe only by a few points in your case since the processing speed is still above average and the IQ is quite high anyway).

If you take these results to a 504 or IEP committee, they may try to tell you that this isn't a problem, because the child is still above the average.  Ask direct questions of the psychologist at the table about the significant difference.  Basically these differences can be a flag for looking ADHD, LD's, executive dysfunction or impacts in other academic areas -- processing speed significantly lower than IQ can make it difficult for kids to do the physical and organizational work to keep up with their brain. [/quote]

Is it 1 standard deviation or 2? I thought it was 2. [/quote]

1 standard deviation is statistically significant.  1.5 standard deviations is the borderline of beginning to get help (meaning "light" help like accommodations) a great standard deviation may be necessary to get an IEP, together with other evidence like adverse impact, etc. 
[/quote]

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