I knew the job was dangerous when I took it ...
- Jul 19, 2004
- Out of Bounds
A soon-to-be-published study of Korean twins raised by different families in different countries identified some unexpected differences between the two subjects.
FULL STORY: https://www.sciencealert.com/pair-o...l-significantly-different-cognitive-abilitiesA Pair of Twins Grew Up in Different Countries, Then Scientists Compared Them
Researchers have taken advantage of a rare opportunity to study identical (aka monozygotic) twins who were separated early in life, before being raised in different countries by different families – and there are some surprising results to report.
Whereas IQ has been shown to be up to 80 percent heritable – with twins usually scoring roughly the same on cognitive tests – in this case there was a substantial 16-point difference between the siblings.
There were, of course, lots of similarities between the pair, but the differences were also notable, suggesting that there needs to be a rethink of how much of our intelligence is down to our genes and how much of it is down to the environment that we're brought up in.
"Similarities were evident in personality, self-esteem, mental health, job satisfaction, and medical life history," the researchers write in their paper.
"In contrast with previous research, the twins' general intelligence and non-verbal reasoning scores showed some marked differences." ...