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Dr. Gillis has decided to use _____________ in his research to guard against both experimenter bias and participant expectations. a. confounding variables. b. random selection. c. the placebo effect. d.
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Dr. Gillis has decided to use _____________ in his research to guard against both experimenter bias and participant expectations.

a. confounding variables.
b. random selection.
c. the placebo effect.
d. the double blined design.
e. factor analysis

User Axeman
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1 Answer

6 votes

Answer:

D

Step-by-step explanation:

User Jiantongc
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