Birth Order

We surveyed 900 undergraduate students, collecting their own birth order, their best friend's birth order, and the birth orders of their parents. This allowed us to analyze two relationships: friendship and romantic.

first author. Discussion. The birth rank analysis of the mother and father data in Survey 1 supported previous suggestions that people are more likely to form romantic relationships with someone of a similar birth order. Parents often had the same birth order

web based survey most were americans but rest was the rest of the world

. Survey 2 confirmed that oldestoldest, middle-middle, youngest-youngest, and only-only relationships, both among friends and mates, are significantly more likely than expected by chance.

10% to 15% more than expected by chance

Our data do not directly speak to the question of what drives this effect. We believe the most likely explanation is as follows: one's birth order helps systematically shape one's personality

Does not identify whether the relationships are successful in the long term tho.

Birth Order Longterm Relationships ARTILCE

Individuals in romantic, intimate, and platonic relationships have a similar birth order(REFERENCE). REFERENCE performed two different surveys to identify the birth order of individuals and of the three most important members in their lives(father, mother, and best friend.) The first survey consisted of 900 undergraduate students in which REFERENCE collected the birth order of the students and their best friends birth order and the birth orders of their parents.  While the second survey was a web-based survey done online, and over 1,000 people participated. In both surveys the birth order of indviduals in a romantic relationship was similar and the same birth order(for instance youngest-youngest) were 10-15% more likely to occur than by luck.

BIRTH ORDER GENDER BRAZIL

Marteleto and de Souza (2013)

(Marteleto & de Souza, 2013)  

data from the 1997–2009 PNAD (Pesquisa Nacional por Amostra de Domicilio), a nationally representative survey collected annually by the Brazilian Census Bureau (IBGE).

birth order

and gender are key factors moderating the association between family size and

these processes.

While we found a strong tendency for firstborn boys to become more likely to work outside the home with each additional sibling, the results also show that larger families are associated with a higher chance of household work for girls, particularly earlierborn girls. Although an additional sibling entails a higher tendency for girls to perform more than ten hours of household work, this is not true of boys.

the sample size of adolescents age 12 to 16 is 175,233.

As Family size increases, the older siblings assume the responsibility of providing economic resources or other resources (Marteleto & de Souza, 2013). Marteleto and de Souza (2013) collected data from Pesquisa Nacional por Amostra de Domicilio(PNAD) from 1997-2009 a survey made by the Brazilian Census Bureau found that large families have increasingly older boy siblings provide economically for their families and their younger siblings to help them go to school. Older female siblings who help inside the home and often work longer than the boys occupy household work. The previous held assumption was that as family size increases the education level decrease, however that is no longer the case as families are more adaptive to the changing environment (Marteleto & de Souza, 2013). Furthermore because of older siblings helping their parents, younger siblings have received adequate education and overall a better learning experience than their older siblings (Marteleto & de Souza, 2013).

BIRTH ORDER EDUCATION ACHIVEMENT 

The present research uses data gathered over the course of a twenty-five-year

longitudinal study

investigation were gathered as part of the Christchurch Health and Development Study (CHDS). The CHDS is a longitudinal study of a birth cohort of 1,265 children born in the Christchurch (New Zealand) urban region in mid-1977. annual intervals to age sixteen years, and again at ages eighteen, twenty-one, and twenty-five.The study has collected information from a variety of sources including: parental interviews, teacher reports, self-reports, psychometric assessments, medical records and other record data.

Child cognitive ability was assessed at ages eight and nine using the Revised

Wechsler Intelligence Scale for Children

At age thirteen cohort members were administered the Test of Scholastic Abilities

1,015 for high school outcomes to 968 for

measures of university attendance/degree attainment. These samples represented

seventy-nine per cent to eighty-three per cent of the original cohort of 1,218

as generally concluded that later-born children are less likely to gain educational qualifications, prestigious jobs and high salaries.

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