The threat of confounding is particularly serious in research ...

[segrsyd]

The threat of confounding is particularly serious in research using
 
  a. randomization
  b. true experiments
  c. subject variables
  d. assignment of subjects to conditions

Question 2

Any factor that is associated with the independent variable and that is not purposely introduced by the researcher is considered a ______ error
 
  a. subject
  b. random
  c. testing
  d. confounding

[leahm14]

Answer to Question 1

c

Answer to Question 2

d

[segrsyd]

Thanks for the timely response, appreciate it

[gcook]

Gracias!