Publications on birth order mostly differ in their findings. In 1874 Galton1 stated that firstborn dominated among eminent men. Thirty years later, Pearson2 claimed that society was corrupted through the defects of firstborn. Surveys3-covering hundreds of books and articles give a remarkably inconsistent picture of the influence of sibling position on physical and psychological development. In ...

A Adler, often thought of as the father of birth order research, claimed that birth order can have lasting effects on one’s personality. He stated that birth order differences in personality are mostly due to siblings trying to compete for the attention of their parents by claiming certain niches or roles within the family (Adler, 1964). One theory underlying this need to establish a role is th...

abstract aim and background: sulloway suggested that birth-order has a significant effect on personality traits, proposing first-borns children are more perfectionistic and more neurotic than later-borns. in abnormal form, perfectionism is closely associated with eating disorders and obsessive compulsive. the purpose of this study was to investigate the effect of birth-order on perfectionism, p...