definitions

Adoption studies (pg 111-112): adoptive studies show the difference between two groups.

1)      genetics relatives (biological parents) vs. 2)environmental relatives (adoptive parents)

Personalities – biological vs. environmental = equal difference of personalities

However, traits are more similar to biological parents than adoptive parents

Twins’ personalities are just as different reared together than apart

*Nature vs. Nurture 

Temperament Studies (112)

person's characteristic emotional

reactivity & intensity (for infants this includes inborn emotional excitability)

(Nedjine)