"But all of these genes together account for just a small percentage of the variation in intelligence test scores, the researchers found; each variant raises or lowers I.Q. by only a small fraction of a point.
'It means there’s a long way to go, and there are going to be a lot of other genes that are going to be important,' Dr. Posthuma said."
Indeed. This result is fully predictable from the several previous GWAS studies on IQ that have been done. Any gene that influences IQ in the general population has at most a small effect, and the variance among human individuals in IQ is the result of interaction of hundreds of genes and the environment the individual lives in.
Here's a link to a lot of good writings by one of the leading researchers on human behavior genetics, for more details. I especially like one particular article I'll link just below the link to his collected writings.
http://people.virginia.edu/~ent3c/vita1_turkheimer.htm
Turkheimer, E. (2000). Three laws of behavior genetics and what they mean. Current Directions in Psychological Science, 9, 160-164.
http://people.virginia.edu/~ent3c/papers2/Articles%20for%20O...
'It means there’s a long way to go, and there are going to be a lot of other genes that are going to be important,' Dr. Posthuma said."
Indeed. This result is fully predictable from the several previous GWAS studies on IQ that have been done. Any gene that influences IQ in the general population has at most a small effect, and the variance among human individuals in IQ is the result of interaction of hundreds of genes and the environment the individual lives in.
Here's a link to a lot of good writings by one of the leading researchers on human behavior genetics, for more details. I especially like one particular article I'll link just below the link to his collected writings.
http://people.virginia.edu/~ent3c/vita1_turkheimer.htm
Turkheimer, E. (2000). Three laws of behavior genetics and what they mean. Current Directions in Psychological Science, 9, 160-164.
http://people.virginia.edu/~ent3c/papers2/Articles%20for%20O...