The psychology professors’ research paper, which can be found online, stated that high school students who were only children or were twins, triplets or quadruplets were excluded from the study ...

Stewart, who wrote what is perhaps the definitive recent work (2012) on the theory and research on birth order. He bases his paper on 529 journal articles published over a 20-year period.

While this paper does not, on its own, disprove the so-called birth-order effect, it does signal the need for more research. Write to Tanya Basu at [email protected] ...

Well, new research shows that birth order really does matter. NPR's Social Science Correspondent Shankar Vedantam spoke with our co-host David Greene. SHANKAR VEDANTAM, BYLINE: Hey, David.

"It was surprising the results are so clear,” co-paper author Julia Rohrer ... This study is not the be-all-end-all of birth order research, though, so it may take a lot more work (and more ...

researchers at the University of Illinois-Champaign found that birth order has no statistically significant impact on personality. The analysis, published in the Journal of Research in Personality ...

Follow-up research connected birth order to IQ, but none of the studies answered why birth order had such an impact. “Joe’s work has taken a big first step in helping us understand what is driving ...

Other research showed first-born children accepted more responsibility and are more self-confident. Birth order research goes back centuries. "Starting in the 1800s, people started to assume that ...

Birth order theory suggests that first- and last-born children have a unique position in the family, while middle children do not. Research suggests that middle-born children may believe that they ...

Stewart, who wrote what is perhaps the definitive recent work (2012) on the theory and research on birth order. He bases his paper on 529 journal articles published over a 20-year period.