Which of the Following Is an Example of an Extraneous

question 6

Multiple Choice

Which of the following is an example of an extraneous variable?

• A) A new strength training program
• B) A diet intervention
• C) Extra steps added by those who lost weight in an obesity study
• D) Aerobic fitness outcome measures in a cardiac rehab program

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Definitions:

Before-after Study

A study design in which the same group of subjects is measured before and after a specific intervention or event, to assess its effects.

Case-control Study

A type of observational study where two groups are compared: those with the disease or outcome of interest (cases) and those without the disease (controls), to identify factors that may contribute to the disease's presence.

Case-series

A descriptive study type that tracks subjects with a known exposure or treatments to document outcomes.

Cross-sectional Survey

A variety of observational research that evaluates information gathered from a whole population or a proportional segment, during a singular time frame.