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(To the moderator: Yes, this is a type of advertisement, but I think that the topic would be interesting to people at this forum. Plus, there is more information about current research at that site that may interest readers.)
Have just taken your test, but am not at all convinced about your premise.I would agree that people will associate with other people who share a similar value set, but not necessarily of a similar personality.On the other hand, my anecdotal observations are that people will also tend to associate with people of a similar IQ (and in particular, women tend to have great difficulty if they marry a man of lower IQ to themselves, which will tend to mean that high IQ women will have a greater likelihood of marrying a high IQ man, although the converse is not always as true). Given that we already have evidence that first borns are differentiated from their siblings by their IQ, have you made any allowances that what your method is really measuring similarity of personality, or just another way of measuring similarity of IQ?
Nearly a century ago Alfred Adler suggested that one's birth order affects one's personality.
Boys with older brothers 'more likely to be gay'Last Updated: 2:26am BST 27/06/2006Boys are more likely to grow up gay if they have older brothers - because of biology, rather than upbringing.Ten years ago researchers made the startling discovery that the more elder brothers a boy has, the greater chance he has of being homosexual.For each additional brother that precedes him, a boy's likelihood of growing up gay increases by a third.At the time it was speculated that this was because boys with elder brothers are psychologically affected by their family dynamics in a way that influences sexual orientation.But new research published today in the journal Proceedings of the National Academy of Sciences (PNAS) shows this is not the case.The link between fraternal birth order (FBO) and being gay only exists when brothers have the same biological mother.Having older adopted or stepbrothers with a different mother made no difference to whether a boy turned out gay or straight. However, brothers sharing the same mother but raised in a separate family still exerted an influence.The discovery was made by Dr Anthony Bogaert, from Brock University in St Catherines, Canada, who with a colleague first uncovered the birth order link with homosexuality.Dr Bogaert did not conclude what biological factors influence the sexuality of homosexuals with elder male siblings, but previous research has shown that genetics and the womb environment can have a major impact on sexual preferences in both men and women.
I've seen this research about birth order an homosexuality. I understand it's fairly controversial, although the paper just quoted was published in in PNAS, which is a good journal.I wrote a little bit more about birth order effects on my new blog, so in case anybody is interested: http://www.scienceblog.com/cms/does-birth-order-affect-personality-13956.html
Secondly, you suggest that proof of a birth order effect would undermine the nature side of the nature/nurture debate. I would disagree with this categorically.
Hi Coglanglab, I took the test, but at the end on "click to learn more about this experiment" my window shut down. Is there anyway to get to the information on the experiment without taking the test again?Thanks