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More elegant but not necessarily better

>estimated max of 148-152

I don't know where y'all get this data from. Every study where APM scaled scores were used had ceiling of 135:

https://www.semanticscholar.org/paper/Equating-the-Standard-and-Advanced-Forms-of-the-Jensen-Saccuzzo/5fe47db4dc488eac9ff18b9948ace113f915c987

Triple Nine Society must've abolished use of APM II when they found out that their norms are a bit off.

This is irrelevant to what the post is sahing, but have you tried mindgames? If not heres a link: https://play.google.com/store/apps/details?id=mindware.mindgamespro The sample populatiom is huge, so i guess tgat it is safe to say that the tests are somewhat reliable. Likewise, there are some good working memory tests. Try path memory and anticipation level 2.

Undergraduate at a prestigious university costs lots of money. School is mostly signaling, I doubt you need 4+ years to learn how to administer a single test. Going to grad school has a significant opportunity cost for smart individuals. Tons of smart people are driven by ideas rather than money.

Here's your source, you neurodivergent: https://www.amazon.com/Factor-Science-Evolution-Behavior-Intelligence/dp/0275961036/ref=sr_1_3?crid=1CPBPW3CXC5LE&keywords=g+factor&qid=1658168612&sprefix=g+facto%2Caps%2C160&sr=8-3

I have seen worse ideas succeed, like this one

thanks for the comment ! I thought nice to bring in some good vibes.

I think some of it has to do with time limit. If there is a strict time limit, I suspect the effect will be larger than otherwise, for obvious reasons (tell me if they aren't obvious).

I do think there is some practice effect in most perceptual reasoning tests in any case as well.

Someone posted a large meta-study on practice effect not too long ago. I'll link it below. I just took a quick look at it.

There was a significant effect, in fact, the MEAN effect was ~0,5SD or 7,5 IQ points. This was after 3 prior tests, and there was no significant practice effect after that. HOWEVER, 2/3 of the population was given THE SAME TEST those 3 tries, and only 1/3 were given alternate forms (though not significantly different).

When looking at retest for alternate forms, the effect was ~0,15-0,2SD or ~3 IQ points. HOWEVER, the time interval between retests mattered. If a long time had passed, the effect was smaller (in fact, it was -0,0008SD per week, which seems extremely slow).

What's interesting is that the studies that used alternate forms actually had shorter time intervals than those with identical forms. This means that the impact of alternating forms is even larger than the drop of ~ 0,2-0,35SD relative to identical form retest effect, ceteris paribus.

It should be noted, however, that the retesting of different studies was made with very different amounts of time, as far as I could gather. Some within the same week, others after several years. That's honestly quite a big problem for the study...

Here's the study: https://www.semanticscholar.org/paper/Retest-effects-in-cognitive-ability-tests%3A-A-Scharfen-Peters/048102820f00a77ec242e5459a7c25ce1bccfa62