Question: A study funded by the National Center for Complementary and Alternative Medicine found that echinacea was not an effective treatment for colds in children. The

A study funded by the National Center for Complementary and Alternative Medicine found that echinacea was not an effective treatment for colds in children. The experiment involved echinacea treatments and placebos, and blinding was used. What is blinding, and why was it important in this experiment?

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