Determining the Appropriate Research Method

The video tutorial explains the differences between sample surveys, experiments, and observational studies. It discusses the purpose, advantages, and disadvantages of each method. Surveys are efficient for large samples but rely on honest responses. Experiments establish causation but can be costly and raise ethical concerns. Observational studies are simple and inexpensive but cannot determine causation and may introduce observer bias. The tutorial helps viewers understand when to use each method based on their research goals.

What is a key characteristic of an observational study?

• It always determines causation.

• Participants are aware they are being studied.

• A variable is manipulated to observe effects.

• The study only involves observing without interference.

Which of the following is an advantage of surveys?

• They can establish causation.

• They are always inexpensive.

• They can be tailored to specific questions.

• They require no participant honesty.

What is a potential disadvantage of surveys?

• They always require a small sample size.

• They can suffer from non-response issues.

• They are always expensive.

• They cannot be administered in different forms.

What is a primary advantage of conducting an experiment?

• It is always ethical.

• It can establish a cause-and-effect relationship.

• It is the least expensive method.

• It requires no control over variables.

Why might observational studies be considered unethical?

• They always involve high costs.

• They can involve observing people in private settings without consent.

• They always lead to biased results.

• They require participants to perform dangerous tasks.