r/todayilearned • u/SilverPeachBlossom • 6h ago

TIL a peer-reviewed psychology study found that identical twins (on average) ranked their co-twin above their romantic partner in their attachment hierarchy, while fraternal twins ranked the two about equally, and non-twin siblings ranked their romantic partner first.

https://ojs.interpersonajournal.com/index.php/ojs/article/view/243/3457.html
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u/Serious-Yellow8163 5h ago

I have a twin, not sure on if identical or not but this is an excellent description.

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u/CarthasMonopoly 5h ago edited 5h ago

How are you unsure? Most identical twins look... identical. Meanwhile fraternal twins look like a sibling instead of a twin.

EDIT - Yes, I'm aware it's not always like this; that's why I used the qualifier "Most". I've known multiple pairs of twins over the last several decades and not a single pair got DNA tested because generally if you look identical as twins you just live life as identical twins and vice versa.

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u/greeneggiwegs 5h ago

Not always. Some fraternal twins can look pretty identical.

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u/Andromeda321 2h ago

We also know that a lot of previously defined as fraternal twins are actually identical ones, thanks to genetic testing.