Curiously, I've heard the opposite. A friend who went through a Master's program in education relayed something his special education professor said: "I don't know what IQ tests measure, but they do it precisely."
A friend who went through a Master's program in education relayed something his special education professor said: "I don't know what IQ tests measure, but they do it precisely."
I haven't met the friend or his professor, but either something has been lost in relating the saying, or a different issue is being addressed. The best literature on IQ testing
would make any practitioner aware that there is an error band around ANY mental test score from any brand of mental test, and also that IQ scores change over the course of life for most individuals, and anyway no IQ test has even perfect test-retest reliability, much less perfect correlation with any other IQ test.
