WISC V/CAT4 disparity

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My DD (just turned 10) is AuDHD and has just been diagnosed with dyslexia and dysgraphia.

We have just had an extensive EP assessment as evidence for a refusal to issue EHCP appeal. As part of that, the EP did WISC V cognitive testing and she scored:

FSIQ: 116
FRI: 123
VCI: 108
PSI: 108
WMI: 117
VSI: 97

She has also just done the CAT tests at school in part to supposedly give an indication as to 11+ potential (we're in a Grammar area).

She scored:

Verbal: 113
Quantitative: 93
Non-verbal: 106
Spatial: 88

Obviously, there's quite a large disparity between the two sets of scores. Any thoughts?

Both scores seem relatively similar; VSI is a spatial test, 97 and 88 not far apart.
Both verbal sections stronger; again 108 and 113 not that far apart.
Children learn how to do these tests and often progressively score stronger as they become familiar with format.
what are your thoughts?
adhd children often have lots of variability between the different sections.
what did the ed psych say?

@BreakingBroken Thank you for your response!

Some additional context would probably be useful 🙂 So her score on the matrix reasoning subset was on the 95th percentile and he said that her "visual spatial reasoning removing visual motor integration was exceptional". Her picture concepts score was on the 98th percentile and that her "ability to work with non-verbal concepts was exceptional for her age."

He said that she was "intellectually able" and that she was "significant underachieving".

She also scored 121 for reading comprehension, 106 for word reading and 91 for spelling.

So very spiky, but it doesn't make it easy to work out the best fit for secondary schooling!

the EP ones will be more reliable. For CAT testing kids aren’t prepped, they do it together as a larger group. Some kids rush through them, don’t concentrate etc.
the WISC is done in a standardised and timed way. It is then normed specifically for her age (eg 10:05). If she has a range of neurodevelopmental conditions it’s typical to perform differently due to affective factors (tiredness, sensory overwhelm, attention skills).

basically the wisc has shown what her potential is.

she is a bright child. her FRI puts her in the very high range and is a good indicator of underlying intelligence.

Yes schooling options with her profile will be difficult. I’d focus on good mental health vs good academic scores.

Mine has a very spiky profile - ADHD diagnosed and probably on the autistic spectrum (undiagnosed). He had a full EP assessment in Y2. It wasn't the WISC but something very similar. His ADHD was undiagnosed at the time and given he's quite demand avoidant too, I'm surprised that the EP got anything our of him. Interestingly his verbal and non verbal reasoning scores were on the 88th centile (about 118 if I remember correctly) and working memory on the 93rd but his expressive language down on the 27th and one of them right down on the 7th - but that may have been related to lack of concentration. Since being on ADHD medication he has begun to show more of what he is capable of at school but he has a specific problem with writing and sometimes his teachers dont see past that. He's just done his sats and he may scrape greater depth in reading and maths - he's achieved standardised scores of over 110 in reading and maths every year since Y3 but not worked hard this year. Does he underperform at school - hell yes. I could have pushed him to do his 11+ as we live on the very edge of a grammar school area but he would have resisted the pressure and would have not coped even if he got a place. So he's going to a school literally across road - fairly bog standard comp but with a huge focus on inclusion.