What Is the Common Purpose of Using the Double Blinding

question 31

Multiple Choice

What is the common purpose of using the double blinding and deception techniques?

• A) they are more economical and easier to use than randomization or matching
• B) they keep participants' perceptions of the experiment constant across different conditions of the experiment
• C) they eliminate the effects of most known extraneous variables
• D) they eliminate experimenter bias

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