from http://www.gnxp.com/MT2/archives/2003_frey_and_detterman_IQ_SAT.pdf

**Caution: **The formulas below do NOT work with "extreme scores" (perhaps over 1250 SAT) as explained by formula originator Frey in the email below. For other SAT scores, one can compare the IQ generated by the formula to an SAT - IQ conversion chart .

**1. For SAT scores before 1996**, Professors Detterman and Frey of Case Western Reserve University provide this formula:: IQ = (0.126 x SAT combined) + (-.4.71E - 5 x SAT combined x SAT combined) + 40.063 . (Data in chart "a" below. Chart "b" uses a formula with a cube of SAT)

Using this formula with President George W. Bush's 1206 combined SAT scores:** **(0.126 X 1206) + (-0.0000471 x 1206 x1206) + 40.063 = 124 IQ for Bush.** **The same 124 number is obtained from an SAT - IQ conversion chart and is close to the 125 estimated by *The Bell Curve* author Murray for a similar 1206 combined SAT score.

**2. For SAT scores from 1996 -2004** to an IQ score, Detterman and Frey provide this formula: IQ =(0.095 X SAT Math) + (0.003 X SAT Verbal) + 50.241 (Small data sample in chart "c" below) Scores for SAT were "re-centered" in 1996, raising the average SAT back to 500.

**After 2004 with the new SAT**, Detterman thinks that IQ will still be predictable from SAT scores, but a study of the data may lead to a revised formula.

From: |
"M. C. Frey" <murphy@case.edu> |

To: |
vansloan@yahoo.com |

Subject: |
RE: 2nd request to clarify your SAT-IQ formulas |

Date: |
Thu, 20 Jan 2005 11:37:27 -0500 |

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