9/3/2023 0 Comments Chimp test human benchmarkIf I recall the conversion from rIQ to pIQ, it was something like rIQ + 2.023*e^((rIQ-100)/32). If you’ve seen the website which applies the log-normal distribution to ratio scores, pIQ is sort of like taking a rarity IQ and mapping it to what would be expected on a ratio scale, but Melao wasn’t using mental age, and had his own construction. pIQ was an attempt at a ratio scale on the Sigma Test. Thanks for clarifying! I have no qualms with what you’ve said, and believe I likely wasn’t being very clear, especially if it was in a discord group.īasically, scores on the Mega Test were inflated, and the actual cutoff was around 4SD rather than the 5SD Mega Society claimed. From what I’ve read 3SD WISC scores often turn into 4SD WISC extended scores, etc. This is of course because theses scores don’t tend to be normally distributed. Obviously by pure rarity there’s no way in hell I’m at 183, but on a ratio test or if I had been given the chance to take the WISC-extended at the right age I think I could have scored in that range. Is roundabouts where I’d show up on the normal curve SD 15. My WAIS FSIQ is 160, and based off of an extended-range SAT designed by a former psychometrician on reddit, my SAT-derived IQ would be about 166, but this might change because the Quant section is deflated according to her. pIQ is like the scale used on the Mega Test. My rarity IQ on the Sigma Test is 174 SD 16, and on their pIQ scale that’s around 195 (used to be 183 on an unfinished form I submitted). I do understand that by definition IQ is fit to the normal curve, but wasn’t always the case, ratio scores, for example. I was probably making the case that fitting IQ to the normal curve by definition might not be advised in the extremes, because intellectual ability probably has a fat tail, like many other products of assortative mating. I don’t recall 183 specifically, but I understand and don’t disagree with you. This suggest inaccuracy of self-reported data but it may also suggest that above level 21, the test starts measuring certain cognitive strategies and stops measuring g. However one oddity about the self-reported data is that all of the people scoring 21+ score 24+. IQ = 77 + (highest level obtained in first 10 tries)(3.33) Thus I would predict that a random sample of American youngish adults would average 6.84 (SD = 4.5). Thus assuming a normal curve, the top 19% and bottom 3% should have IQs of 147+ and sub-98 respectively.Īssuming the sequence memory test is sufficiently g loaded, this implies level 21 = IQ 147 and level 6 = IQ 97. 19% of my readers self-reported Human Benchmark sequence memory highest scores of level 21+ (after 10 attempts).ģ% of my readers self-reported highest scores of 6 or less.Įvidence continues to accumulate showing that on a scale where Americans average IQ 100 (SD = 15), my global readership towers with an average IQ of 129 (SD = 19).
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