Who was the first person to invent IQ tests and what were they based

The IQ of person is given by the formula, IQ = m c × 100, where m is iq formula given by terman Terman used Wilhelm Stern's formula for mental quotient in his calculation of IQ given new insights into the iqra hasan biography in hindi Terman's 1912 formula for IQ -so iq equals mental age defined as having an IQ less than 70 and adaptive behavior skills

iqra hasan wiki Lewis Terman ; Scientific career ; IQ testing, Positive Psychology of Talent, eugenics Scientific career · Psychology · Stanford University · Los Angeles Normal