The Problem With IQ Tests

in popular culture the term IQ is everywhere do IQ exams do that you probably need 120 points of IQ don't my IQ IQ IQ IQ low IQ individual people who post about their IQ are losers when people say IQ what they mean is intelligence an objective rigorous measurement of intellectual ability but does it actually work well in this video I want to find out where IQ came from what does it actually measure what can it predict about your life and I guess what is my IQ I have never taken an official IQ test before honestly I don't think I'm terribly smart I've always kind of considered my IQ to be maybe just a little above average exothermic or endothermic I feel like that should be exothermic good job Science Guy there are a lot of IQ tests online but I am very skeptical about their accuracy still I figured some of them may be good practice for the real thing tomorrow I'm going to do an IQ test for real before I do that I want to try to improve my score and so I'm going to try to do a whole bunch of practice tests I think this test is trainable but tomorrow we're going to see whether that's true or not the idea of intelligence testing goes back hundreds of years but the first concrete breakthrough occurred in 1904 English psychologist just Charles Spearman was studying students grades in different subjects and he wondered how their performance in one subject like English would relate to their performance in another like math one option would be that the better a student did in math the worse they would do in English maybe because they spent more time on their math work and so had less time to devote to English so performance in different subjects would be negatively correlated another option was that performance in one subject would be completely unrelated to Performance in another after all different subjects require different skill sets so maybe marks would be totally uncorrelated the third option was that the better a student did in math the better they would do in English in other words their marks would be positively correlated a correlation coefficient can vary anywhere from negative-1 to positive 1 a correlation coefficient of negative 1 indicates a perfect negative correlation meaning an increase in ...