Music may help people relax. Darius got two groups of people together. He took everybody's pulse and blood pressure. Then he allowed one group to listen to
soothing music while the other group sat in silence. After the song was over, he
measured everyone's pulse and blood pressure again.
Parts of the Experiment
Independent variable
I
Dependent variable
Controlled Groups
Constants (Factors
monitored to prevent
introducing another
independent variable)

Independent variable - sitting in music or silence

Dependent variable - pulse and blood pressure

Control group - the group that sat in silence

Constants - the type of music

Explanation:

When you're conducting an experiment, it's important to keep track of the variables. The independent variable is the variable the experimenter controls. It's assumed to have a direct effect on the dependent variable. The independent variable in this experiment is whether the participants are sitting in music or silence, and the dependent variable affected by it are the participants' pulse and blood pressure.

The control group is the group that isn't exposed to the independent variable, while the group exposed to it is called the experimental group.

In order to determine the effect of the independent variable, we need to keep the rest of the conditions constant. In this experiment, it's important to keep the participants exposed to the same type of music. If the music they were exposed to was different, we could consider the type of music another independent variable.

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