overview on Intelligence test

EVOLUATION :
The evolution and introduction of the intelligence tests as the "Brightness Indes" of an individual daes back to the second decade of the 20th century.It was the German Psycologise,w.stern who first suggested in 1912 that the mental age of an individual,which was not always the same as the chronological age,could be espressed as his ability to the cokmprehend and analyse problems as compared to a normal person of his age.He suggested that the mental age of an individual could be expressed as aratio ti his chronological age.He clalled this ratioo as the Brightness Index of a person.This Brightness Index is now temed as the Intelligence quotient or the IQ