The authors of this article studied 817 American men and women in 1995. They were researching the effects of birth order on educational achievement, ordinal position, and social strata; assuming that these were related based on works of other researchers. The researchers used a survey that tried to include different ethnicities and classes into the study group. The researchers found that only middle class social groups had a significant relationship between birth order and educational achievement. However, they mentioned that they may not have surveyed enough people of higher or lower classes to get a more diverse sample. The findings of this article correlate with the research I’ve collected in other articles, and what I’ve hypothesized;
