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In an experiment, the volume of music is changed and reading speed is measured. What type of variable is reading speed?

Answer and explanation

Correct answer: Dependent variable

In an experiment, the independent variable is deliberately changed, while the dependent variable is measured to see the effect of that change. A controlled variable is kept constant so that it does not interfere with the comparison. Identifying these roles depends on what the investigator changes and what result is recorded, not simply on the wording of the variable.

Here, the volume of music is changed by the investigator. Reading speed is then measured to find out whether the music volume affects it. Therefore, reading speed is the dependent variable, making option D correct. It is not the independent or changed variable in this setup; those descriptions apply to music volume. Conditions such as the reading material and available time could be controlled if needed.

Related tags

ScienceDependent-VariableMusicReading-SpeedVariables In An ExperimentExploration: Entering The World Of Secondary ScienceExploration Entering The World Of Secondary ScienceClass 9 Mcq

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