The international standard for testing IQ is the International Standard Intelligence Test.

The International Standard Intelligence Test is a quantitative, standard measurement of intelligence. Two individually administered tests are still widely used today: the Stanford-Binet test and the Wechsler test. Stanford-Binet scale IQ distribution: 140 or above is very good (genius); 120-139 is excellent; 110-119 is above average and smart; 90-109 is average; 80-89 is below average; 70-79 is borderline Insufficient intelligence; those below 69 are mentally retarded.

Significance

The IQ score can quantify a person's performance on an intelligence test compared to a control group. Its validity comes entirely from other people who took the same test and belong to the same group. results are compared, and the most important question is what kind of test the participants took and who they were compared to.

In other words, each person will get many values ??about his or her IQ, depending on how many different tests he or she takes and the nature of the control group in each test; A person with average intelligence will score lower than a group of people with more average intelligence.