An Introduction Furr Pdf — Psychometrics

Validity is the most crucial concept in psychometrics. It asks the ultimate question: Does this test measure what it claims to measure? Furr emphasizes that validity is not a property of the test itself, but of the of the scores.

Imagine stepping on a bathroom scale three times in one minute. If it reads 150 lbs, then 180 lbs, then 145 lbs, you would throw it away. It is unreliable. Reliability, in psychometric terms, is the degree to which a measurement is . It answers the question: Does this measure give the same result under consistent conditions? psychometrics an introduction furr pdf

But how do we know if our psychological ruler is any good? Furr anchors the entire discipline on two fundamental pillars: and validity . Validity is the most crucial concept in psychometrics