The Stanford-Binet test is the first ever IQ test. This IQ test involves measuring the intelligence of a person based on 5 factors:
Once all these factors are tested, the weightage of each individual depart is measured and combined together to give a final outcome, that is, the IQ score.
This test is one of the most dependable and reliable IQ tests since it is the first ever test introduced and has gone through many revisions.