internal consistency

Member Training: Practical Advice for Establishing Reliability and Validity

October 30th, 2019 by

How do you know your variables are measuring what you think they are? And how do you know they’re doing it well?

A key part of answering these questions is establishing reliability and validity of the measurements that you use in your research study. But the process of establishing reliability and validity is confusing. There are a dizzying number of choices available to you.


What Is Reliability and Why Does It Matter

October 26th, 2017 by

Some variables are straightforward to measure without error – blood pressure, number of arrests, whether someone knew a word in a second language.

But many – perhaps most –  are not. Whenever a measurement has a potential for error, a key criterion for the soundness of that measurement is reliability.

Think of reliability as consistency or repeatability in measurements. (more…)