[Yvain]

I agree with this, but the reason I'm focusing on intellectual curiosity was that of all the traits measured in the survey, it was the one that did show a significant effect of firstbornness, and it was also the only personality trait with a significant effect of firstbornness in Rohrer's study.

I'm not just assuming it, I'm saying that two analyses showed it was the only trait that mattered, and then it suffices to explain the current data.

[molszanski]

I don't disagree. Findings are definitely interesting, promising and worth further investigation!

I preach cautiousness in the name of finding the objective truth. One should be careful when testing a specific group of people.