Dr. Bishop is studying the effects of a drug on memory. Half of his participants will receive the drug, while the other half will receive a placebo. The pills the two groups of participants will take look exactly the same. Dr. Bishop hopes that the use of a placebo will ____.
a. allow him to have control over the dependent variables
b. show if memory improvement is based on participant expectations
c. create a double-blind design for his research
d. eliminate the chance of random variables confounding his experiment
Question 2
In research, uncontrollable factors such as the temperature of the room, the mood of the participants, and chance effects are considered ____ variables.
a. independent
b. random
c. dependent
d. control
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