30.1k views
3 votes
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
by
7.0k points

1 Answer

6 votes

Answer:

D

Step-by-step explanation:

User Jiantongc
by
8.9k points
Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.