Multiple Choice
In a study on the effects of caffeine on memory, participants drank a bottle of tasteless water containing 100, 50, or 0milligrams of caffeine. Neither the researcher who handed outthe bottled water nor the study participants knew whether the water contained caffeine or not. This is an example of a _____study.
A) correlational
B) case
C) single-blind
D) double-blind
Correct Answer:
Verified
Correct Answer:
Verified
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