Observational Study or Experiment Vocab Review

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What is the explanatory variable?

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The explanatory variable is the variable that is manipulated or changed in an experiment to observe its effect on the response variable. In the context of obesity and cholesterol levels, the explanatory variable is obesity.

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What is the response variable?

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The response variable is the outcome that is measured in an experiment. In the context of diets and blood pressure, the response variable is blood pressure.

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What is a double-blind experiment?

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A double-blind experiment is a study design where neither the participants nor the researchers know which treatment the participants are receiving, reducing bias.

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What is an observational study?

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An observational study is a type of research where the researcher observes subjects without manipulating any variables. It does not involve treatment or intervention.

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What is an experiment?

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An experiment is a study in which the researcher manipulates one or more variables to determine their effect on a response variable.

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What is the difference between an explanatory variable and a response variable?

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The explanatory variable is what is changed or controlled in a study, while the response variable is what is measured or observed.

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What is a placebo?

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A placebo is a substance with no therapeutic effect used as a control in testing new drugs.

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What is random assignment?

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Random assignment is the process of assigning participants to different groups in an experiment randomly to ensure each participant has an equal chance of being placed in any group.

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What is a control group?

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A control group is a group of subjects that does not receive the treatment or intervention being tested, used for comparison.

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What is a treatment group?

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A treatment group is a group of subjects that receives the treatment or intervention being tested in an experiment.