Experimental Design

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What is an independent variable in an experiment?

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The independent variable is the variable that is changed or controlled in a scientific experiment to test its effects on the dependent variable.

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What is a dependent variable in an experiment?

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The dependent variable is the variable that is measured and affected in the experiment; it is the outcome that is observed.

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What is a controlled variable?

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A controlled variable is a factor in an experiment that is kept constant to ensure that the results are due to the independent variable.

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How do you identify the independent variable in a research question?

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The independent variable is typically the factor that is manipulated or changed by the researcher in the experiment.

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How do you identify the dependent variable in a research question?

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The dependent variable is usually the outcome or effect that is measured in response to changes in the independent variable.

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What is the purpose of a control group in an experiment?

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The control group serves as a baseline to compare the effects of the independent variable, helping to isolate the variable being tested.

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What is the significance of randomization in experimental design?

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Randomization helps to eliminate bias by ensuring that each participant has an equal chance of being assigned to any group, enhancing the validity of the results.

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What is a hypothesis in the context of experimental design?

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A hypothesis is a testable statement or prediction about the relationship between the independent and dependent variables.

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What is the role of replication in experiments?

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Replication involves repeating an experiment to confirm the results and ensure that they are reliable and not due to chance.

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What is the difference between qualitative and quantitative data?

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Qualitative data is descriptive and involves characteristics that can be observed but not measured, while quantitative data involves numerical measurements.