2. Definition
“Birth order is
defined as a
person's rank by
age among his or
her siblings. Birth
order is often
believed to have a
profound and lasting
effect on
psychological
development.”
3. Variations of the Theory
Alfred Adler (1870-1937)
Suggested that birth
order affects personality
Talks about genetics
Widely disputed
4. Frank J. Sulloway
(1947-)
Theory revolves around the ‘Big Five’
6th added later, as theory progressed
Depending on order, the traits are
redistributed
5. Personality
Order in Family Traits most likely Conclusion
First Borns Leaders, responsible
types, need to
manage, need control,
focus.
Low risk takers that
above all want to
suceed.
Second Borns/Middle
Borns
People people,
compromisers, need
to belong, peace-
keepers
Need people in order
to succeed, and will
go far to keep
relationships intact.
‘Onlies’ Quiet achievers,
finishers, work well,
want recognition,
secretive.
Aim to please, mostly
themselves by setting
high bars.
Youngests Idea people, creative,
fun, impatient.
Enjoy life, sometimes
can be hedonistic, but
impact everyone.
6. Robert Zajonc
Intelligence
1st borns have higher IQ due to adult
influences
Intelligence depends on family size
Younger children less smart due to many
influences.
7. Careers
Model of careers depending on Birth
order:
1st borns: More suited for leadership
roles, managements, administration, not
business
Middles: Perfect for business, stock
markets, working in the field
Youngests: Good with art, usually have
lowest ranking jobs
8. Sexuality is greatly affected by
the theory, due to genetics.
Every 3rd male has a 95% of being homosexual, by product of
evolution
Women’s sexuality not affected
9. Genetics
Play a part in intelligence and sexuality,
as an instinct
Personlity depends on genes of parents,
as much as birth order
Influences early on counter this theory
