A great tool for making broad diagnostics with regard to childhood-to-adult brain development. Also useful for identifying disabilities and neurodivergence.
But useless as a means of stack ranking already demonstrably intelligent people or sifting for "genius" intelligence in a pool with variation in education and experience. Getting a "good IQ score" is like bragging about acing your "Do you have Alzheimers?" cognitive exam. "Oh! He can draw clocks twice as fast as any of his peers! Incredible!"
Sure. Just remember there's a strong correlation between high IQ results and frequency of taking IQ tests, meaning that IQ tests can absolutely be trained. Yet so many treat it as a "general intelligence" measure, when it's more accurate to say it just measures practice at things the IQ test tests, and at some level some ability in the areas it tests.
Its conception and first uses were tailored to have data backing up the concept poor people, disabled people, and black people were dumber, thereby justifying forced sterilisation and human rights abuses of those groups.
In fact, the Nazis used a modified version inspired by the american concept of IQ tests to justify their genocide of disabled people.
And even today it's a bit problematic, because it doesn't measure what a lot of people assume it measures. Leave it to the professionals for the areas it's still useful for.
How the fuck does that graph even works?!
Shows the very left of the graph, then says you're in the top? Doesn't make any sense. Edit : clearly I belong in the top 85% too. I guess I confused % and percentile!