Experimental Design (Unit 3 Part 1)

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What is experimental design?

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Experimental design is a systematic method used to plan, conduct, and analyze experiments to determine the effects of one or more independent variables on a dependent variable.

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What is causality?

Back

Causality refers to the relationship between cause and effect, where one event (the cause) directly influences another event (the effect).

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Why is random assignment important in experiments?

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Random assignment helps ensure that each participant has an equal chance of being placed in any group, which minimizes bias and balances participant characteristics across groups.

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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 intervention being tested, allowing for comparison against the experimental group.

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What is the difference between correlation and causation?

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Correlation indicates a relationship between two variables, while causation implies that one variable directly affects the other.

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What is a hypothesis?

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

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What is an independent variable?

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An independent variable is the variable that is manipulated or changed in an experiment to observe its effects on the dependent variable.

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What is a dependent variable?

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A dependent variable is the variable that is measured in an experiment to assess the effect of the independent variable.

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What is the purpose of blinding in experiments?

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Blinding reduces bias by preventing participants or researchers from knowing which group participants belong to, thus minimizing expectations influencing the results.

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What is a sample size?

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Sample size refers to the number of participants included in a study, which can affect the reliability and validity of the results.