Fabrizio Benedetti found that _____ injections of placebos were more effective in reducing pain than _____ injections. a. predictable; unpredictable b. visible; hidden c. hidden; visible d. unpredictable;

Fabrizio Benedetti found that _____ injections of placebos were more effective in reducing pain than _____ injections.

a. predictable; unpredictable
b. visible; hidden
c. hidden; visible
d. unpredictable; predictable

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Fabrizio Benedetti found that _ injections of placebos were more effective in reducing pain than _ injections. a. predictable; unpredictable b. visible; hidden c. hidden…

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Fabrizio Benedetti found that _____ injections of placebos were more effective in reducing pain than _____ injections. a. predictable; unpredictable b. visible; hidden c. hidden…

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Fabrizio Benedetti found that _ injections of placebos were more effective in reducing pain than _ injections. a. predictable; unpredictable b. visible; hidden c. hidden…