We wish to test the hypothesis that music improves learning. We compare test scores of students who study to music with those who study in silence, Which of the following is an extraneous variable in this experiments?
Correct answer: C. the amount of time allowed the studying
- A. the presence or absence of music
- B. the students test scores
- C. the amount of time allowed the studying
- D. silence
Explanation
The amount of study time is extraneous because it could affect test scores without being the factor under investigation. Music is the independent variable, while test scores are the dependent variable.
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