A psychologist is conducting a study on the effect of music on math ability. She hypothesizes that participants who listen to classical music will perform better on a math test than those who listen to pop music. She randomly assigns participants a music condition (classical or pop) and then asks them to complete a timed measure of math ability. Which variable in her study is the independent variable?

A. Music type
B. Math ability
C. Math speed
D. Music preference


Answer: A

Psychology

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Psychology