A placebo is a fake and inert substance, procedure, or treatment that has no known direct effects.
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Q221: A single-blind technique is one in which
Q222: The placebo effect is any change attributed
Q223: Random assignment means that all participants in
Q224: Random assignment helps ensure that potential differences
Q225: The purpose of the double-blind technique is
Q227: The experimental technique in which the researchers,
Q228: The purpose of the double-blind technique is
Q229: The double-blind technique is used to guard
Q230: In a research study, subtle cues or
Q231: Any change in performance that results from
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