Quisley's hypothesis is that listening to classical music improves intellectual performance. He randomly divides a mathematics class into two rooms. In room A, music by Mozart plays softly in the background during a lecture. In room B, the students listen to a lecture without background music. The independent variable is ____.
a. whether music played during a lecture.
b. mathematical performance.
c. the level of mathematics taught.
d. present only in the control group.
Question 2
An experimenter wants to determine if taking a specific amount of the drug Prozac relieves depression. Which element will be most in need of an operational definition in this study?
a. The dependent variable
b. The independent variable
c. The inferential statistic
d. An experimental confound
An individual's performance can be limited by environmental conditions, such as temperature. Ac
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