One threat to a study's validity is the possibility of ...

[laurencescou]

One threat to a study's validity is the possibility of reactivity, which refers to the tendency for participant to change their behavior when they
 
  a) want to sabotage the study.
  b) realize they are being observed.
  c) are told the results are confidential.
  d) receive excessive compensation for their efforts.

Question 2

Research has suggested that in cultures or social contexts where heavy drinking is considered normal,
 
  a) there are lower consumption rates.
  b) there are higher consumption rates.
  c) women are less likely to become alcoholics than women in cultures where drinking is discouraged.
  d) men in the lower social classes are more likely to become alcoholics.

[mirabriestensky]

Answer to Question 1

b

Answer to Question 2

b

[laurencescou]

Excellent

[ultraflyy23]

Gracias!