2007-01-05 12:40:40 · 3 answers · asked by Anonymous in Education & Reference ➔ Other - Education
"Originally, IQ was calculated with the formula:
100 X (mental age / chronological age)
A 10-year-old who scored as high as the average 13-year-old, for example, would have an IQ of 130 (100 X 13/10).
Because this formula only worked for children, it was replaced by a projection of the measured rank on the Gaussian bell curve with a center value (average IQ) of 100, and a standard deviation of 15 or occasionally 16.
Modern IQ tests produce scores for different areas (e.g., language fluency, three-dimensional thinking, etc.), with the summary score calculated from subtest scores. The average score, according to the bell curve, is 100."
2007-01-06 00:45:59 · answer #1 · answered by peter_lobell 5 · 0⤊ 0⤋
100
2007-01-05 12:50:20 · answer #2 · answered by Udaysankar C 3 · 0⤊ 0⤋
120s-avaerage
to 145- smart
above 145-genius.
2007-01-05 13:53:29 · answer #3 · answered by coco puffy. 5 · 0⤊ 0⤋