The new findings, from a landmark study published Friday, showed that eldest children had a slight but significant edge in I.Q. — an average of three points over the closest sibling. And it found that the difference was not because of biological factors but the psychological interplay of parents and children.
From an article in The New York Times, Findings on Birth Order and I.Q. Prompt Debate on Influence of Family Dynamics.
My younger sister e-mailed this article to me, effectively settling the debate on which one of us is smarter. Interesting stuff. Oldest sibling is definitely a good position to be in. But on reflection, how much do three IQ points really matter?
Among siblings, three I.Q. points means the world. 🙂