Background : “IQ” is a stale test meant to measure mental capacity but in fact mostly measures
extreme unintelligence (learning difficulties), as well as, to a lesser extent, a form of intelligence, stripped of 2nd order effects. It is
via negativa not
via positiva. Designed for learning disabilities, and given that it is not too needed there (see argument further down), it ends up selecting for exam-takers, paper shufflers, obedient IYIs (intellectuals yet idiots), ill adapted for “real life”. The concept is poorly thought out mathematically (a severe flaw in correlation under fat tails, fails to properly deal with dimensionality, treats the mind as an instrument not a complex system), and seemed to be promoted by
- racists/eugenists, people bent on showing that some populations have inferior mental abilities based on IQ test=intelligence; those have been upset with me for suddenly robbing them of a “scientific” tool, as evidenced by the bitter reactions to the initial post on twitter/smear campaigns by such mountebanks as Charles Murray. (Something observed by the great Karl Popper, psychologists have a tendency to pathologize people who bust them by tagging them with some type of disorder, or personality flaw such as “childish” , “narcissist”, “egomaniac”, or something similar).
- psychometrics peddlers looking for suckers (military, large corporations) buying the “this is the best measure in psychology” argument when it is not even technically a measure — it explains at best between 2 and 13% of the performance in some tasks (those tasks that are similar to the test itself)[see interpretation of .5 correlation further down], minus the data massaging and statistical cherrypicking by psychologists; it doesn’t satisfy the monotonicity and transitivity required to have a measure (at best it is a concave measure). No measure that fails 80–95% of the time should be part of “science” (nor should psychology — owing to its sinister track record — be part of science (rather scientism), but that’s another discussion).
- It is at the bottom an immoral measure that, while not working, can put people (and, worse, groups) in boxes for the rest of their lives.
- There is no significant correlation (or any robust statistical association) between IQ and hard measures such as wealth. Most “achievements” linked to IQ are measured in circular stuff s.a. bureaucratic or academic success, things for test takers and salary earners in structured jobs that resemble the tests. Wealth may not mean success but it is the only “hard” number, not some discrete score of achievements. You can buy food with a $30, not with other “successes” s.a. rank, social prominence, or having had a selfie with the Queen.
Some argue that IQ measures intellectual capacity — real world results come from, in addition, “wisdom” or patience, or “conscientiousness”, or decision-making or something of the sort. No.
It does not even measure intellectual capacity/mental powers.
If you want to detect how someone fares at a task, say loan sharking, tennis playing, or random matrix theory, make him/her do that task; we don’t need theoretical exams for a real world function by probability-challenged psychologists. Traders get it right away: hypothetical P/L from “simulated” paper strategies doesn’t count. Performance=actual. What goes in people’s head as a reaction to an image on a screen doesn’t exist (except via negativa).
