Experimental Design

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What is Experimental Design?

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Experimental design is the process of planning an experiment to ensure that it can effectively test a hypothesis by controlling variables and ensuring valid results.

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What is a dependent variable?

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The dependent variable is the variable that is measured in an experiment. It is affected by changes in the independent variable.

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What is an independent variable?

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

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Why is it important to change only one variable in an experiment?

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Changing only one variable allows for a clear understanding of its effect on the dependent variable, ensuring that results are valid and reliable.

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What is a control group?

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A control group is a group in an experiment that does not receive the treatment or independent variable, serving as a benchmark to compare results.

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What is the placebo effect?

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The placebo effect is a phenomenon where participants experience a perceived improvement in condition due to believing they are receiving treatment, even if it is inactive.

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What is the purpose of replication in experiments?

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Replication is the process of repeating an experiment to confirm findings and ensure that results are consistent and reliable.

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What is a hypothesis?

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A hypothesis is a testable statement or prediction about the relationship between two or more variables.

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What is the significance of randomization in experimental design?

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

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What is a variable in an experiment?

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A variable is any factor, trait, or condition that can exist in differing amounts or types and can affect the outcome of an experiment.