HMS, BM EQ-Bank 408 MC

A researcher is investigating the impact of aerobic training on resting heart rate 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.
Having participants rest quietly for 5 minutes before taking heart rate measurements.
Recruiting participants from different age groups and fitness levels.
Taking multiple heart rate readings and calculating the average for each participant.

Show Answers Only

\(A\)

Show Worked Solution

A is correct: Same equipment and timing ensures consistent measurement conditions.

Other Options:

B is incorrect: Good practice but doesn’t address consistency between measurement sessions.
C is incorrect: Different groups increase variability, reducing reliability.
D is incorrect: Multiple readings improve accuracy but don’t address session consistency.