Suppose Timothy is interested in testing the effect of stress on test performance. Which would be the MOST appropriate operational definition of the independent variable?
A) whether the participant is told that the test score counts for a large or small percentage of course grade
B) whether the participant scores above or below 70 percent on the test
C) whether the participant does or does not complete the test within an hour
D) whether the participant does or does not appear nervous while taking the test
Correct Answer:
Verified
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