Identical twins grew up in different countries.
The difference in their IQ was amazing
There are few cases where twins grow up separately (and it is good that they do), so the present case is a rare medical and sociological document.
So what other differences, and similarities, did the researchers find between the nurses?
Walla!
health
10/05/2022
Tuesday, 10 May 2022, 07:16 Updated: 09:25
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A case of twins born to different fathers was discovered (story in a minute)
A pair of identical twins who grew up in separate countries showed unexpectedly large gaps in cognitive abilities while displaying very similar personality traits.
A comparison of the characteristics of the nurses sheds new light on an ancient debate.
Is it the environment or genetics that determine the level of intelligence.
The twins in question were born in Seoul, South Korea, in 1974, the sisters separated at the age of two when one twin got lost in the market.
Despite her parents' appearance on a TV show about missing persons, the young girl was unable to reunite with her family and was eventually adopted by a couple in the US, the IFL website reported.
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To the full article
Growing up in the country, the adopted twin was unaware that she even had any siblings until she did a DNA test and transferred her to South Korea's family reunification program in 2018. Two years later, she was notified that not only did she have the same twin, but another brother and sister.
Genetics or environment?
A pair of twins (Photo: ShutterStock)
Once reunited, the twins completed a series of tests designed to assess their intelligence, personality profile, mental health and medical history.
Somewhat
surprisingly, the results found that the IQ of the twin who grew up in the US was 16 points lower than that of the sister who grew up in Korea.
No more than seven points. Referring to the unexpectedly large gap between the two sisters, the study authors write that "it is amazing that the twins showed significant differences in the cognitive abilities associated with strong genetic influence."
It is difficult to say whether this gap was caused by the twins' different growth, although the researchers note that the sister who grew up in the US suffered from three previous concussions, which may have affected her cognitive abilities. It was similar, consistent and with moderate personal genetic effects in adulthood. "
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"It is worth noting that the two twins received a significantly high score in conscientiousness, indicating that they are both intentional, well-organized, obedient and striving for achievement," the researchers said.
The fact that these similarities persisted despite the contrasting living experiences and home environments of the nurses is interesting, emphasizing the role that genetics plays in determining a person's temperament.
For example, while the twin who grew up in Korea described growing up in a loving and harmonious family home, the adopted sister reported more difficult education, which was colored by constant conflicts and her parents ’adopted divorces.
Despite this, the couple had identical scores for self-esteem and very similar mental health profiles.
The two also shared aspects of their medical history, with both undergoing surgery to remove tumors from the ovaries.
However, the twins
were divided over ideologies embedded in their culture, with the sister growing up in the US exhibiting a more individualistic view while the sister growing up in Korea had more collectivist values.
Decisive conclusions can nevertheless be drawn.However, this study provides some fascinating new insights into the genetic, cultural, and environmental factors that influence human development.
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