Ruben wants to determine if listening to different types of music will have an effect on a person’s pulse. His hypothesis states that if people listen to rap music, their pulse will increase more than if they listen to other types of music. Ruben takes each participant’s pulse before, during, and after listening to 30 minutes of music. He has his mother listen to rock music, his sister listen to classical music, and his friend listen to rap music. From the data collected, he determined that rap music raises a person’s pulse the most. 1. Identify the independent and dependent variables in Ruben’s hypothesis. 2.Despite the results, this experiment is not able to support Ruben’s hypothesis. Suggest specific improvements that will make the experiment test the given hypothesis. Explain why these changes are improvements.

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In any scientific experiment, the independent variable is the one the experimenter changes. The dependent variable is the one measured in order to see if the hypothesis is supported or not. All other conditions (the controlled variables) should remain as identical as possible to make sure the independent variable is the only thing being tested.

1. In Ruben's experiment, his independent variable is the type of music being played, and his dependent variable is the subjects' heart rate.

2. Although it would appear at first glance that Ruben's hypothesis is...

(The entire section contains 281 words.)

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