3 types of studies

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What is an observational study?

Back

An observational study is a type of research where the researcher observes and records behavior or outcomes without manipulating any variables. No treatment is assigned.

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What is an experiment in research?

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An experiment is a study in which the researcher manipulates one or more variables to determine their effect on a dependent variable, often involving a control group.

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What is a survey?

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A survey is a method of collecting data by asking people questions, often used to gather opinions, behaviors, or characteristics from a sample of a population.

Front

What is the main characteristic of an observational study?

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Generally, a control group is not needed in an observational study.

Front

What type of study involves random assignment of participants to different groups?

Back

An experiment.

Front

In which type of study can results be generalized to a larger population?

Back

Results from a survey can often be generalized if the sample is representative.

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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 treatment on the experimental group.

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What is a key difference between observational studies and experiments?

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Observational studies do not involve manipulation of variables, while experiments do.

Front

What type of study was conducted when a researcher asks people about their opinions at a mall?

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This is a survey.

Front

What is the significance of random selection in surveys?

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Random selection helps ensure that the sample is representative of the larger population, reducing bias.