The below table is based on the first 29 people to take the Pieces test (excluding likely repeat attempts and people who spent less than 2 minutes). Since the totality of evidence now suggests that relative to their non-clinical general U.S. population, my sample has a Wechsler full-scale Z score of 1.93 (SD = 1.33) this distribution was then adjusted by the 0.6 correlation (no contamination) between WAIS-III full-scale IQ and Object Assembly (similar to Pieces) and then equated to the sample distribution to estimate the general population Z scores.
Pumpkin Person 
A Z-score of 2.85 is equivalent to an IQ of ~142 or 1 in 435 (spatial working memory)
I do not know what that means exactly.
I once made a nanotube model out of chicken wire.
I made about 30 to 40 roles and stitched then together perfectly.
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This is why I have my ideas about a.i. that do not involve large language models. Because you need spatial intelligence to make and put together objects. The way you fix a car you need to deconstruct the problem of what is broke and where things go and in what order.
That needs a translation of the 2D surface into a 4D pick and place procedure. Square peg square hole by remembering the shape. but also understanding what shapes don’t go together with many steps involved.
Like how you get an object on the computer screen. The two dimensional retina projects through onto the brain which then have the 3D shape constructed and manipulated. The brain does it different than a computer but still you can rotate the computer objects onto the screen. The brain works in reverse.
Take a look at this chart I made pumpkin.
The web says we can test kids IQ by age 11-12 and this is stable.
However fluctuations happen in teenage years because of ups and downs of puberty by 20 points.
In Schizophrenic episodes IQ goes down as onset happens in the early 20s
But Intelligence peaks by ages 25 to 30
I believe my IQ peaked near age 25 to 30 which is about 114 FSIQ in 2013
When I was 14 years old I was 114 on The Kaufman scale for children.
Can you comment on how stability works in IQ testing?
Did my FSIQ really go up and down or was it just stress?
It is believed IQ is fixed.
But we cannot test all people all the time to make sure?