An experiment in which the participants do not know whether they ...

[neverstopbelieb]

An experiment in which the participants do not know whether they are receiving the treatment or placebo but the scientists do is called a
 
 A. disorganized study.
  B. double-blind study.
  C. single-blind study.
  D. cause and effect study.

Question 2

At times, control subjects may experience an apparent effect of the study treatment even though they did not receive any treatment. This phenomenon is called
 
 A. the placebo effect.
  B. a biased outcome.
  C. the control effect.
  D. a blinded outcome.

[rnehls]

Answer to Question 1

C

Answer to Question 2

A