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 ...

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.

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] ...

A recent study by Damian and Roberts argued that there wasn't enough evidence to confirm that personality is affected by birth order. Their research paper states: "The debate over the effects of ...

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.

"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 ...

A researcher named Alfred Adler developed birth order theory in the 20th century. The theory claims that the order in which a child is born shapes their development and personality. Adler also ...

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.