Observational study or experiment

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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 and records behavior or outcomes without manipulating any variables. It does not involve intervention.

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What is an experiment?

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An experiment is a research method where the researcher manipulates one or more variables to determine their effect on a dependent variable, often involving control and experimental groups.

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What is a dependent variable?

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A dependent variable is the outcome or response that is measured in an experiment to see if it is affected by changes in the independent variable.

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CCSS.HSS.IC.B.3

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What is an independent variable?

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

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CCSS.HSS.IC.B.3

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What does random assignment mean in experiments?

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Random assignment is the process of randomly allocating participants to different groups in an experiment to ensure that each group is similar and to reduce bias.

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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, serving as a baseline to compare the effects of the experimental group.

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What is a treatment in an experiment?

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A treatment is the specific condition or intervention applied to the experimental group in an experiment.

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What is the purpose of a hypothesis in research?

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A hypothesis is a testable prediction about the relationship between variables in a study, guiding the research process.

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What is the difference between qualitative and quantitative research?

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Qualitative research focuses on understanding concepts and experiences through non-numerical data, while quantitative research involves numerical data and statistical analysis.

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What is a sample in research?

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A sample is a subset of a population selected for study, used to make inferences about the larger group.