HMS, BM EQ-Bank 408 MC

A researcher is investigating the impact of aerobic training on VO₂ max over an 8-week period. Which of the following data collection approaches would most significantly improve the validity of the research?

Testing participants using the same equipment at the same time of day for each measurement.
Using a control group of participants who do not participate in the aerobic training program.
Recruiting a large sample of 1,000 participants from diverse fitness backgrounds.
Publishing the research findings in a peer-reviewed journal.

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Consider Option B:

Using a control group improves validity because it allows researchers to determine whether changes in VO₂ max are due to the aerobic training intervention rather than other factors (like maturation or external variables).
This helps establish causality and strengthens the internal validity of the investigation.

Other Options:

A is incorrect: Improves reliability (consistency of measurements) but doesn’t primarily address validity.
C is incorrect: May improve generalisability (external validity) but doesn’t specifically address whether the test accurately measures the impact of aerobic training.
D is incorrect: Relates to credibility through peer review but occurs after data collection and doesn’t impact the validity of the original data collection method.