Nokea
You are conducting a study of insulin resistance and its relationship to body weight. Using a weight scale as your instrument to measure body weight, you find the scale always reads 30 kg regardless of who is standing on it. Discuss the validity and reliability of the scale.
Correct Answer: A
Rationale: Reliability refers to consistency of the measurement, which this scale demonstrates by consistently reading 30 kg. However, validity refers to accuracy, which this scale lacks since it does not measure true weight.