Why is "IQ" unreliable?

Speaking of IQ, it is generally believed that this is an absolute value reflecting the level of intelligence. But this is not the case.

This starts with the founder of IQ test. The inventor of modern IQ test is alfred binet, a Frenchman. He and a doctor named Theodore Simon spent a year designing a test table about children's intelligence, which is the famous "Binet.Alfred". Alfred-Simon intelligence scale ".

This scale can evaluate a child's current cognitive level, and the others have no effect. At that time, Binet.Alfred. Alfred and Simon have no intention of summarizing human intelligence into a single number.

But once the research results are published, there will naturally be related applications that can be combined. Someone found a tool that can quickly classify people into three, six and nine categories. They swarmed in at once. These people are the identities and admirers of eugenics.

When Binet.Alfred. The Alfred-Simon Intelligence Scale came out at the time when eugenics was popular in Europe and America. Because most people accepted the view of eugenics at that time, a scientific evaluation method was like a universal hammer. So, there is the concept of "IQ", and then there are the concepts of ratio IQ, deviation IQ and IQ grading standard. For example, those with scores above 160 are geniuses; 120 to 140 excellent; Normal from 90 to120; People under 80 are mentally retarded. ...

The introduction and popularization of the concept of IQ and the mode of dividing people into three, six and nine grades are not considered by the founders of IQ monitoring, but fundamentally stem from the demand of trying to classify people. Many technologies are so stale in the application process. When we look at similar evolution, we should not only have the perception of cognitive bifurcation, but also return to the original insight.

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