Segal also researched the question of separate classrooms for twins, and concluded that schools should respect parents’ and kids’ wishes on this matter, if possible, rather than have blanket policies.
The funny thing is, people are often convinced that “Twins should be in separate classrooms no matter what, to help them develop into individuals.” I am not sure exactly what they mean by this, and I am not sure that they themselves are sure what they mean by such vague ideas. Do they mean that “We want twins to be more different from each other, and putting them in different classrooms will achieve this”?
Because the thing is, a) there is no clear evidence that making people more different from each other is inherently valuable, and b) there is no evidence that putting twins in separate classrooms causes their personalities to diverge. If anything, there is some intriguing evidence that the opposite may be the case. When twins spend time together, they often diverge slightly in an semi-deliberate way, as they don’t want to feel like competitors in everything and therefore choose to adopt slightly different roles in their social groups. If placed in separate environments, they may actually behave more similarly to each other; it’s a version of the “couple effect.”
I think a lot of people have this kind of vague feeling that twinned-ness is somehow pathological, and that we should make twins be as much like singletons as possible, but again, there is evidence that being a twin is protective in many ways. Twins live longer than singletons, for example, and the effect is stronger for men and stronger for identical twins, suggesting that the sheer emotional strength of the bond is actually good for people (women tend to get more emotional support from friends, so the relative effect of having a twin is most likely stronger for men than for women). In particular, the fact that having an identical twin is particularly powerful in terms of longevity is really striking, considering that identical twins in particular are more likely to have slight health problems before and around birth. Perhaps human society would be better, in some ways, if we were like goats (or whatever animal it is) and were all born with a twin as standard…
I really recommend reading Segal’s book Twin Mythconceptions, by the way; it is very evidence based, and quite fascinating.
ncmedsoc.org/do-twins-live-longer/#:~:text=While%20both%20fraternal%20and%20identical,to%20predict%20their%20sibling's%20needs.