A pair ofidentical twinswho were upraise in separate country have exhibit unexpectedly gravid disparity in cognitive power while demonstrate highly similar personality trait . A comparison of themonozygotic sibling’scharacteristics throw away new light on the age - oldnature / nurture disputation .

gestate in Seoul , South Korea , in 1974 , the sisters became separated at the old age of two when onetwingot lost at a market . Despite her parent ’ coming into court on a television program about missing someone , the untested girl could not be reunited with her family and ended up being adopted by a couple in the US .

spring up up stateside , the adopt twin was unaware that she even had any sibling until she submitted herDNAto South Korea ’s program for reuniting family extremity in 2018 . Two long time later , she received word that she not only had an identical counterpart , but an older chum and sister too .

Having been reunited , the Gemini then fill out a series of tryout design to assess their intelligence , personality profiles , genial wellness , and medical history . passably surprisingly , solution let out that theIQof the twin grow in the US was 16 points downcast than that of the Korean - raise sib .

The determination , published in the journalPersonality and Individual Differences , contradict late studies onmonozygotic Gemini , which have betoken an average IQ difference of no more than seven points . notice on the accidentally large disconnection between the two sisters , the study source write that “ it is striking that the counterpart showed substantial differences in cognitive abilities that have been linked to stronggeneticinfluence . ”

Whether this divergence was get by the Twin Falls ’ different upbringings is hard to say , although the researchers take note that the sister raised in the US had suffered three previousconcussions , which may have influenced her cognitive capacities .

Continuing their assessment of the pair , the researcher go on to uncover that “ the overall configuration of the Gemini the Twins ' personality was like , uniform with lit on moderate genetic influences on personality in maturity . ”

“ Notable is that both twin are distinctively mellow on Conscientiousness , designate that both are purposeful , well - organized , duteous , and achievement - striving . ” That these similarities prevail despite the Sister ’ contrast life experiences and place surround is interesting , and highlights the character thatgeneticsplay in find out aperson ’s temperament .

For instance , while the similitude raised in Korea trace growing up in a loving and harmonious family nursing home , the adopted sister report a harsh upbringing , color by unconstipated difference of opinion and the divorcement of her take over parent . Despite this , the twosome had selfsame scores for ego - regard and highly similarmental healthprofiles .

The duad also shared aspects of their medical account , with both have undergone surgery to dispatch tumor from their ovary . However , the Twin Falls differed with wish to their culturally imprint political orientation , with the US - raised sib demonstrating a more individualistic outlook while the sister raised in Korea had more collectivist values .

Understandably , instance of twin being raised individually are rare , and more cases like this need to be studied before any firm conclusions can be pull . notwithstanding , this subject field provides some fascinating newfangled insights into the genetic , ethnical , and environmental factor that act upon human growing .

This clause wasoriginally publishedin May 2022 .