A researcher has been investigating difference in personality among family members. The ...

A researcher has been investigating difference in personality among family members.
 
  The difference among family members in regard to personality traits is accounted for by a combination of genetic differences among the children and the unique relationships of each child. The unique relationships among the children is an example of the:
  a) shared environment
  b) nature  nurture controversy
  c) nonshared environment
  d) None of the above.

Question 2

Which of the following is the best description of neurotransmitters?
 
  a) brain neurons
  b) psychoactive drugs
  c) electrical discharges
  d) chemicals that carry signals

Question 3

Epidemiologists are primarily interested in the
 
  a) treatment of illnesses.
  b) use of experimental methods.
  c) occurrence of illnesses in a population.
  d) causes of stigmatization among mental patients.