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a big difference between an iq of 82 ans 86?

I don't imagine that the difference between a person who scored an 82 score and one who scored an 86 would be all that great. But as I said before, it depends on other factors, not just a test score.


I found a really good article that backs up how I feel about the subject of intelligence testing. Hope you enjoy it chief.:

What do IQ tests measure?
IQ tests measure current academic abilities -- not any sort of fixed, innate intelligence. More specifically, the best-known IQ battery, "Stanford-Binet 5," measures Fluid Reasoning, Knowledge, Quantitative Reasoning, Visual-Spatial Processing, and Working Memory. Collectively, these skills are known as "symbolic logic." Among other things, IQ tests do not measure creativity;[i] they do not measure "practical intelligence" (otherwise known as "street smarts");[ii] and they do not measure what some psychologists call "emotional intelligence."

The Genius in All of US

A bit of context to go with your question would be nice...

If the same person were to score 82 and 86 on an IQ test, the difference wouldn't mean much, because the results may also depend on their state of mind at the time of taking the test. 82-86 would be more of a 'range' than a true indication of change in their intelligence.

The uncertainty in an IQ measurement is almost always greater than +/- 4. So, statistically, there is no difference. It's kind of like weighing things on a scale that you know measures pounds accurately, but not tenths of pounds, and getting measurements of 50.6 pounds and 50.9 pounds--you can assume that, within the accuracy of the scale, the two items weigh the same.