Gradually, this test was developed widely, with the participation of many famous scientists and established organizations. The initial IQ test serves the purpose of determining intelligence and classifying elementary students. IQ scores are calculated and compared among people of the same age, the results of 10-year-old students are compared with other 10-year-olds, not compared to 30-year-old adults. Scores below 60 or over 145 are extremely rare, accounting for very small percentages. The closer the score is to 100, the greater the number of people achieved. IQ is calculated in numbers, with 100 being the average. IQ test is the most common and prestigious measurement for assessing one's intelligence.
