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LEARNING OBJECTIVES
- Explain why researchers often include multiple dependent variables in their studies.
- Explain what a manipulation check is and when it would be included in an experiment.
Imagine that you have made the effort to find a research topic, review the research literature, formulate a question, design an experiment, obtain institutional review board (IRB) approval, recruit research participants, and manipulate an independent variable. It would seem almost wasteful to measure a single dependent variable. Even if you are primarily interested in the relationship between an independent variable and one primary dependent variable, there are usually several more questions that you can answer easily by including multiple dependent variables.
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