A group of researchers wanted to study the effects of alcohol on learning. In this study, some participants drank
. of wine before watching a documentary on World War II. Other participants were assigned to drink a placebo (liquid that looked, smelled and tasted like wine) before watching the same documentary. Then all participants took a test to measure how much they accurately learned about WWII.
In the study described above, amount of wine consumed is a variable and score on the test given on WWII is a variable.
A. measured; measured
B. manipulated; manipulated
C. manipulated; measured
D. measured; manipulated
Leave a Reply