Validity is more critical to measurement than reliability. A valid measurement is reliable, but a reliable measurement may not be valid. Do you agree with these statements? Explain your answer. Provide examples to support your rationale.
Validity determines the magnitude (strength) of the correctness or actuality of our estimate or conclusion or inference. It answers the question, "is the measurement correct?" Consider, for a made up example of two scales that measure the weight of a new born baby. The measurements on scale 1 and 2 are 15lbs and 8lbs respectively. Based on past data, scale 2 is more valid than scale 1. There are different types of validity estimators.
Reliability is a measure of consistency or repeatability under different conditions. A ...