From the article: "'It's been kind of a shock to the system that it hasn't worked,' said psychologist Eric Turkheimer at the University of Virginia, who had no role in the study. 'We can't find the effects of any individual genes that are large enough to seem worth worrying about.'"
. . . .
"Robert Plomin of the Institute of Psychiatry in London, who's looked for intelligence-related genes for 15 years but didn't participate in the new study, isn't surprised by the latest findings.
"'We've got a century of twin and adoption studies,' such as those comparing twins reared in different families, that support the notion that about half of IQ differences come from DNA, he said.
"Plomin said this doesn't mean half of a person's intelligence is due to genes nor does such a genetic influence imply that a person's intelligence is fixed."
. . . .
"Robert Plomin of the Institute of Psychiatry in London, who's looked for intelligence-related genes for 15 years but didn't participate in the new study, isn't surprised by the latest findings.
"'We've got a century of twin and adoption studies,' such as those comparing twins reared in different families, that support the notion that about half of IQ differences come from DNA, he said.
"Plomin said this doesn't mean half of a person's intelligence is due to genes nor does such a genetic influence imply that a person's intelligence is fixed."