identical twins raised apart

• A study that looked into the different factors that affect human development compared the characteristics of a woman who grew up in South Korea to that of her twin sister, who was raised in the U.S.
• The sisters were born in Seoul in 1974, but were separated from each other at the age of 2 after one of them got lost at a market and was eventually adopted by American parents.
• The twin who grew up in Korea described living in a loving and harmonious household, while the one who lived in the U.S. shared an upbringing with regular conflict and the eventual divorce of her adoptive parents.
• Published in the journal Personality and Individual Differences, the study found that the twins somehow developed similar personality traits but significantly different IQ levels.

A pair of identical twins who grew up in separate countries have somehow developed similar personality traits but significantly different IQ levels, a recent study has found.  

In the study published in the journal Personality and Individual Differences, researchers from Kookmin University in Seoul and California State University compared the characteristics of a woman who grew up in South Korea to that of her sister, who was raised in the U.S.