부산대학교 도서관

Alfred Adler, a late 19th-and early 20th-century Austrian psychotherapist and founder of individual psychology, suspected that birth order leads to differences in siblings. For example, in a 2015 study, which included 377,000 high school students, psychologist Rodica Damian and her colleague Brent W. Roberts, both then at the University of Illinois at Urbana-Champaign discovered that firstborns tended to be more conscientious, extraverted and willing to lead. [Extracted from the article]