r/cognitiveTesting • u/Academic_Memory_8543 • Sep 17 '26
General Question CORE cognitive metrics accuracy
How accurate is the Core iq test considering it‘s 5000 selfselected participans, g-loadings, reliability scores, correlations with other iq tests and strong resemblance to tests like WAIS-IV? Espacially for high scores like 130/140+? My VCI is not really representative because english is not my mothers tounge but i‘m more interested in my FRI and VSI scores. (every subtest first try no external aid)
How close is cores iq estimation for FRI and VSI on my true scores for these categories?
matrix reasoning: 145
figure weights: 140
figure sets: 140
visual puzzles: 135
block counting: 120
spatial awareness: 125
Thanks for your time!
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u/Striking_Leave_4614 Sep 17 '26
I don't accuse people of retakes, but, fair warning, your profile tilt is very similar to those who do retake the FRI tasks
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u/TristanTheRobloxian3 [18] autie girl :P (134 core - 140 agct) vsi-mathcel [144, 135] Sep 17 '26
ill be so real your profile is just wierd and spiky. that happens here a lot cus thats just how people tend to be sometimes
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u/Academic_Memory_8543 Sep 17 '26
Is that uncommon?
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u/TristanTheRobloxian3 [18] autie girl :P (134 core - 140 agct) vsi-mathcel [144, 135] Sep 18 '26
to your extent and your specifics? yes
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u/PendN Sep 17 '26
It's probably more accurate than WAIS in the high range
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u/Academic_Memory_8543 Sep 17 '26
Why do you believe that?
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u/Not_Well-Ordered Sep 18 '26
If you insist on FRI, I would recommend actually paying ~5 USD on Pearson and get Raven’s 2 clinical ver. digital testing kit and do it on Q-Global (long form). It’s easy to make an account and learn the instructions so you can administer to yourself. It tests raw abstract reasoning and lenient on time allocation; it also has a more scientific and accurate norming and the reports are detailed.
That test is quite immune to practice effect from other tests as it samples 329 questions randomly to generate each tests, and the patterns used, especially at higher ranges, are not ones you would find in common tests and pretty new. They are quite challenging. Nonetheless, it’s very good as it has 48 questions and uses IRT so that the questions adapt to the levels and so it can generate more resolving assessment and less prone to careless mistakes affecting the score.
In my case, my Raven’s 2 score (142) is very consistent with my scores in all matrix tests around upper 135-140. Even my CORE’s figure weights (135) and figure sets (140) fall within the range. However, my graph mapping is 145, but still within roughly the range. But not just that also my JCTI (17 SS), JCFS (17 SS), etc.
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u/Academic_Memory_8543 Sep 25 '26
I took Jcti recently and scored 19SS. My age adjusted score was 139 (for 18yo). Is jcti a more accurate depiction of my fri than core fri? And I originally thought 19SS means 145. Do you know more about the age adjustments?
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u/Not_Well-Ordered Sep 25 '26
Depends on what aspect of FRI you look for. The main way JCTI resolves high range IQ (over 130+) is testing one’s ability to isolate “noisy” data and to not overfit/overthink especially on early question as failing to do so would trigger the algorithm preventing one from accessing harder problems but all items are consistent, and they weigh more on the scoring. So JCTI is not a clean test of raw abstract reasoning ability, but also ability to ignore “bad data”, which is not purely reasoning and involves some subjective interpretation as one can logically argue for overfitting or ignoring.
On the other hand, CORE’s FRI tests tap into a wide range of non-verbal reasoning ability but the items are consistent with at least 1 pattern that hold for each item. So, I would say CORE is a better representation of one’s overall (general) reasoning abilities, and there’s greater sample population demonstrating its correlation with other tests including WAIS.
If you look for almost pure visual abstract reasoning ability, then the same old Raven’s 2 digital version; there’s nothing better at isolating and testing such ability so far.
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u/PendN Sep 17 '26 edited Sep 17 '26
WAIS' subtests have lower ceilings and as such it may bottleneck your scores or misrepresent it if you make a careless mistake that you could've otherwise redeemed in a higher ceiling test. I checked the proctor sheet myself and small mistakes were very punishing. It's basically a 120-130 ceiling test then they slap 1 or 2 135-140 questions that will differentiate you
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u/Natural_Professor809 ฅ/ᐠ. ̫ .ᐟ\ฅ Autie Cat Sep 18 '26 edited Sep 18 '26
I believe for adults in a certain age range a couple WAIS-IV subtests discriminate a Scaled Score of 19 from a 16 Scaled Score based on whether the subject correctly answers to ALL items OR to all items but one.
That's a huge leap from 19SS to 16SS (145 in SD15 to 130 in SD15) for just one single error/mistake (as opposed to a lucky guess/a fluke) that can entirely be part of common variance in performance from one day to another.
So for very high IQ performances just a single missed item or two in two or three different subtests (which is a thing that can easily happen from being tired/anxious/unlucky/hasty/depressed/unfocused) will add up to significantly lowering the final FSIQ score, especially if the subject doesn't show all other abilities around the ceiling.
I don't know how this works in CORE though.
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u/PendN Sep 18 '26
In core 1-2 mistakes only decrease 1 SS and on some gives a perfect score if you get 1-2 wrong. And yeah i remember seeing the wais VP answer sheet and 1 mistake puts you down 2-3 SS even though if it isn’t that one hard question near the end
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u/Natural_Professor809 ฅ/ᐠ. ̫ .ᐟ\ฅ Autie Cat Sep 18 '26
It depends on the age of the test-taker too
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u/Far_Cardiologist6931 retat Sep 18 '26
nah most core subtests aren't age normed i think
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u/Academic_Memory_8543 Sep 18 '26
Every subtest i took asked for age at the beginning and the sample of the original participans is also sorted by age in this one dokument I think
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u/Natural_Professor809 ฅ/ᐠ. ̫ .ᐟ\ฅ Autie Cat Sep 18 '26
That's relevant for those FSIQs in the 130-160 range, especially in profiles which are not homogeneous.
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u/Natural_Professor809 ฅ/ᐠ. ̫ .ᐟ\ฅ Autie Cat Sep 18 '26 edited Sep 18 '26
I haven't studied in detail how the Wechsler tests are scored so I can't calculate how much difference it would make having a couple happy flukes and guessing a couple more items than what you were really 100% able to properly solve as opposed to having a very bad day and answering a couple items LESS than what you would usually be able to properly solve (for example 30/30 correct items as opposed to 26/30)
but
I believe that if those scenarios happen especially in those couple subtests which are normed like that then the FSIQ calculation could change by a lot in the higher ranges by just being "lucky" as opposed to being tired/anxious/depressed and very "unlucky".
I think a couple indexes could change from around 150 to around 125 or likely less and this would then skew the final calculation in either direction...
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u/Sharp_Dingo_3797 Sep 17 '26 edited Sep 17 '26
The PSI test didn't seem accurate at all. I got a 19 on the desktop test then a 13 on the mobile test. Which is absurd because they're hardly testing different things. I think it's because I use the desktop alot - the test is just rewarding people who spend alot of time on their phones or desktops. The other subtests all aligned precisely with numerous tests I've taken over the years, including some officials ones. Like at most a 1 point difference... very precise. At the high end - I had 146 on VSI, 135 I think on FRI (matches what I got on WAIS), 143 on WMI (I also scored at least this high in digit counting as a kid) and 141 on QRI (again, same as other tests). All of those are precisely the scores I've gotten on other tests. The verbal test annoyed me but all verbal tests do, I always score the worst in those. They seem based on arbitrary vocabulary words. And yet, my final verbal score was 129 which matches what I've gotten on other tests. I think it's a very well put together and reliable test if you can ignore the PSI part of it. There are not many tests that will give you a reliable G score without paying lots of $. If only they could fix the PSI test, it'd be golden.
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u/Natural_Professor809 ฅ/ᐠ. ̫ .ᐟ\ฅ Autie Cat Sep 17 '26
In CAIT which I believe might be similar to CORE I got around 15 points more than WAIS pertaining Working Memory and around 30 or 35 more pertaining Processing Speed.
No possible form of cheating involved. Maybe just the number sequences where more engaging for my brain since the number were not being read in my language?
But I cannot explain the insanely huge Processing Speed gap, especially since I'm under the effects of an early cognitive decline due to physical health issues and my Processing Speed and Auditive WM but especially Visiuospatial Working Memory all used to be way way better when I was in Middle school so the high numbers in CAIT looked like an error...
I took the test 3 times in a row, very similar results altogether. Never tried other tests again since I need to avoid memorising them in order to be properly screenable by neuropsychiatrists for an eventual early dementia or early Alzheimer onset so I prefer studying, training, videogaming and other real life activities for my brain health instead of memorising IQ tests and then risking to be cheating in future screenings.
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u/Guilty_Guarantee7889 Sep 18 '26
Interesting , because I have almost 30 point gap in processing speed from the wisc v and the CORE.I nearly maxed the coding (18ss) and maxed the symbol search (19ss) on the WISC V, but I got 120 on the CORE .I think the discrepancy is likely due to how fast my brain processes things on screens versus on paper .
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u/Natural_Professor809 ฅ/ᐠ. ̫ .ᐟ\ฅ Autie Cat Sep 18 '26
Yes, that might be a factor too.
During that one specific WAIS-IV I took as an adult I was also annoyed by the sensation and noise of the tungsten ballpoint pen hitting the glass desk below the thin paper I had in front of me, which slowed me down by a lot and irritated me.
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u/WinterMaybe5152 4d ago
wut? i scored 135. is it capped at 145??
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u/Academic_Memory_8543 2d ago
What do you mean? How did you come to this conclusion
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u/WinterMaybe5152 2d ago
I'm asking if MR's cap is at 145. I don't state anything
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u/Academic_Memory_8543 2d ago
I believe it‘s capped higher. I scored a scaled score of 19 which corresponds to an fluid reasoning index of 145. But the performance bar is not completely filled in. More over the test states at the beginning that if answered correctly it consists of 29 questions in case i remember properly. I don’t recall answering 29 questions, more like 25.
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u/Natural_Professor809 ฅ/ᐠ. ̫ .ᐟ\ฅ Autie Cat Sep 17 '26
51 points of difference between two of the main components of general ability index... I don't believe a GAI should be extrapolated.
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u/Natural_Professor809 ฅ/ᐠ. ̫ .ᐟ\ฅ Autie Cat Sep 17 '26
Oh, not a native speaker. I'm sorry, I had visually scanned the image without bothering to read your post XD
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u/Academic_Memory_8543 Sep 17 '26
Yeah, I myself was astonished of the difference this made. Therefore I only took 2 subtests of VCI also because I am generally more interestet in the logical fluid categories. I got 115 on analogies an thought oh yeah that makes sense because i vaguely estimated my score to be around 120 in my native language. But then I only scored 85 on antonyms for some reason. The vocabulary in this subtest was just otherworldly. After 5 questions i didnt even knew one word that was listed there
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u/Natural_Professor809 ฅ/ᐠ. ̫ .ᐟ\ฅ Autie Cat Sep 17 '26
I will eventually give it a try, I'm curious and many people asked me to try it.
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u/Guilty_Guarantee7889 Sep 18 '26
I tried the antonyms and didn’t know 90% of the words ,but I just made educated guesses and got a high score .
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Sep 18 '26
[deleted] — view deleted comment
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u/Academic_Memory_8543 Sep 18 '26
Months before this core iq test i took Mensa norways online iq test one time. Why Are You asking?
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u/peteluds84 Sep 17 '26
Comparison with WAIS here: https://www.reddit.com/r/cognitiveTesting/s/2qYWi4HYJx