The best way to control for the placebo effect is to use: a. ...

[moongchi]

The best way to control for the placebo effect is to use:
 
  a. counterbalancing.
  b. a within-subjects design.
  c. a double-blind procedure.
  d. a between-subjects design.

Question 2

An experiment in which neither the experimenter nor the participants knows which treatment has been administrated to the participant is called:
 
  a. blind.
  b. double blind.
  c. placebo.
  d. invalid.

[InfiniteSteez]

Answer to Question 1

C

Answer to Question 2

B