Without informing them, a researcher assigns participants to either an experimental or a placebo group. The researcher's assistants who test the participants do not know who belongs to which group. The experiment has used a _____.

A) single-blind technique
B) double-blind technique
C) strong experimental manipulation
D) behavioral measure

Question

Hanna Rehbein · Accepted Answer

Final Answer : B, Explanation :  The described experiment has used a double-blind technique, as neither the participants nor the assistants who test them know who belongs to which group. This helps to reduce the effects of experimenter bias and demand characteristics.

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