Question

1. Carmen conducted an experiment to determine if listening to different types of music would affect a person’s pulse. Her hypothesis was that pulse rate would change with different types of music. Each person listened to seven different selections of music for 30 seconds each. Each person’s pulse was taken before the music and then after each 30-second interval of music. The pulses were taken again after the music selections were completed. Based on her experiment, Carmen concluded that a person’s pulse rate changed when the person listened to different types of music. Which component is missing from Carmen’s experiment?
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1 point
A question
A hypothesis
A control group
A description of the experiment

Answer 1

A control group

Explanation: Carmen stated a question and hypothesis and described the procedure, but she did not include a control group (e.g., people who did not listen to music or listened to silence) to compare against the music conditions.