In my previous blog post, I noted that reliability and validity are two essential properties of psychological measurement. Measures of intelligence, personality, vocational interests, and so forth ...

Measurement is an important part of the scientific process. The key aspects concerning the quality of scientific measures are reliability and validity. Reliability is a measure of the internal ...

1. What is the difference between the reliability and validity of a measurement? The validity of a measure is the extent to which differences in scores on the instrument reflect true differences among ...

A measurement can remain accurate as a historical record while becoming invalid for decisions after the object, environment, or measurement path changes. Patterning, assembly, mounting, thermal ...

Even if you’ve started a robust measurement program (good job!) and have data, there can be that niggling doubt. Are you asking the right questions to measure what you’re trying to understand? Is the ...