HORRIBLE SITE IQTEST.COM don't even waste your time. What you think is free isn't, its a scam

I am a professional statistician. Male, age 27.73yr, location Australia.

The validity of the test is questionable. The fact that the mean, sigma and n= are not posted is egregious. The site proclaims that single questions can measure multiple domains of intelligence (up to six at once) and that is very, very unlikely.

The aforementioned notwithstanding, I have found test-retest reliability to be acceptable. I have also found the score I achieved to be congruent with my MENSA test, as well as a test from the International High IQ Society I sat six years ago. With MENSA I scored 141, and with IHIQS I scored 138. On this test I scored 142, which is not statistically different from the mean of those scores. Assuming mu=100 and sigma=15 this would put me in percentile 99.73. If I compare this to my achievements in academia, this checks out pretty well. In classes of 100 or more, I'm usually amongst the most brilliant. At age 20 I was halfway through a Bachelor's degree when a senior lecturer asked if I could provide tuition to his PhD students. In a psychology exam I was 1st out of 591 undergraduate students. In a medical sciences exam in my freshman year, I was 4th out of 557 students, many of whom went on to become medical doctors. Throughout my life people have been dumbfounded by my speech content and production; usually they will comment on the complexity of the words used, and many ask me to slow down. As for numbers, well I have memorised pi to 150 decimal places; that took about two hours. I intuitively understand how to get from A to B having looked at a map only once. In high school I was not Dux (she was incredibly clever, probably IQ=149-152) but I defeated her in national mathematics olympiads as well as several complex problem solving exams for Physics and Chemistry. I can perform arithmetic in my head but that's starting to digress into my professional life so I'll desist. The point I am making is that your IQ score ought to correspond with some other metric, if not several. If you are pretty average at most things, and find B-level maths difficult, or have difficulty constructing narratives or holding information in your mind, or have never really been recognised as having any special intellectual ability, then the chances are your IQ is not greater than 115. If you are a medical doctor who was average in your cohort, your IQ is probably 127 or so. In a nutshell: if you have nothing to show for your intelligence aside from your online IQ score, it would be a good idea to disregard it. Your intelligence is almost certainly average and it hardly matters exactly how average it is. The idea that your intelligence, hitherto concealed, is finally validated by a score of 140 or 150 is a logical fallacy.

Note: I have also sat various rubbish tests on the web (free ones), with scores ranging from 117 to 128 when drunk, and 129 to 155 when sober. Some garbage apps have given me a score of 170. Do not trust these.

One requires a rudimentary comprehension of statistical error if one is to make inferences about whether scores are identical to, or different from, one another. That's an inherent weakness insofar as iqtest dot com is concerned, because they have not, to my knowledge, published data which would permit proper percentile standing. But even if that data were available, one must make *meaningful* comparisons to previous tests, as well as to life achievements and generally recognised abilities.

Disclaimer: I understand IQ only measures certain types of intelligence. Please do not reply with vitriol vis-a-vis what a musical genius or Pablo Picasso or Pete Sampras you are. Yes, there are many kinds of intelligence, but IQ doesn't measure those other ones so it is superfluous to bring them up in the first place, especially considering the title of this thread. If you wish to complain that IQ is meaningless, please first know that you are wrong. If you desperately wish for the gestalt body of Psychological Sciences to revise IQ tests, consider writing to them, but understand their work is difficult. It is also unlikely that IQ will be used in the future to measure additional intelligences; on the contrary, multiple tests will be created and administered alongside or separate from IQ tests.