8.7k views
2 votes
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

1 Answer

7 votes
I believe it’s c) Hidden; visible
User James Simm
by
6.8k points
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