Multiple Choice
Dr. Wickersham wants to examine how light affects participants' performance on a counting task. So she has two groups, one that works under dim light, and one that works under bright lights. She finds that those in the dim-light condition perform better. However, one of her research assistants admits that he gave those in the dim-light condition extra time to complete the task. Now Dr. Wickersham is not sure whether those in the dim-light condition did better because of the lighting or because of the extra time they received. The extra time on the test is an example of a(n) :
A) independent variable.
B) dependent variable.
C) criterion variable.
D) extraneous variable.
Correct Answer:
Verified
Correct Answer:
Verified
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