How can expectancy effects be reduced?
A)By using experimenters who are aware of the hypothesis being investigated
B)By running participants in all groups one-by-one
C)By using a double-blind experiment
D)By avoiding the use of balanced placebo design

Question

Quizplus · Accepted Answer

Using a double-blind experiment can reduce expectancy effects. In a double-blind experiment, both the participants and the experimenters are unaware of which group is receiving the treatment or the placebo, which helps to eliminate any biases or expectations that could affect the results.

How Can Expectancy Effects Be Reduced