Studies have shown that as family size increases, it becomes
harder to determine the personality of each individual sibling.
However, in the cases of a large families (+6 siblings, See
Figure 4), the personality traits of the youngest three siblings
significantly differed from the oldest three siblings. In taking
the Eysenck’s Big Three Model dimensions of personality test,
youngest siblings scored significantly higher for extraversion
compared to the oldest siblings. Youngest siblings also had
significantly higher psychoticism scores compared to oldest
siblings. If personality is a tactic used by siblings in order
to secure their status within the family, increased extraversion
in laterborn siblings may be a means to gather parental
attention. Extraversion is usually marked by sociability,
impulsiveness, activity, liveliness and excitability. As family
size increases, the level of activity due to interaction among
the members also grows. Older siblings, being use to a more
subdued household, might try to res