What is the IQ score level?

People's IQ is generally expressed by IQ, and the grades are as follows:

1, genius: 140 or more?

2. Excellent: 120- 129?

3. Extraordinary: 130- 139?

3. High school and intelligence:110-119.

4. Medium: 90- 109?

5, middle and lower: 80-89?

6. Criticize mental deficiency: 70-79?

7. Mental deficiency: below 70?

IQ calculation formula:

Expressed by the formula: IQ =MA (psychological age) /CA (physiological age) × 100.

1905, French psychologist Binet.Alfred. Alfred Alfred (1857 ~1911) and his students compiled the first set of intelligence scale in the world. According to this intelligence scale, the average IQ of ordinary people is defined as 100.

19 16, Professor Terman introduced this scale to the United States and revised it into Stanford-Binet Intelligence Scale, taking the ratio of psychological age to physiological age as an index to evaluate children's intelligence level. This ratio is called IQ, which is expressed by the formula: IQ =MA (psychological age) /CA (physiological age) × 100.

Refer to the above? Baidu encyclopedia-IQ