When Is a Test Valid?

A test is valid if it measures what it is supposed to measure. If theresults of the personality test claimed that a very shy person was in factoutgoing, the test would be invalid. Reliability and validity are independent of each other. A measurement maybe valid but not reliable, or reliable but not valid.

What is test validity and reliability?

Reliability and validity are concepts used to evaluate the quality of research. They indicate how well a method, technique or test measures something. Reliability is about the consistency of a measure, and validity is about the accuracy of a measure.

What is a valid test example?

Validity refers to how well a test measures what it is purported to measure. ... For a test to be reliable, it also needs to be valid. For example, if your scale is off by 5 lbs, it reads your weight every day with an excess of 5lbs.