How do you know your variables are measuring what you think they are? And how do you know they’re doing it well?
[Read more…] about Member Training: Practical Advice for Establishing Reliability and Validity
How do you know your variables are measuring what you think they are? And how do you know they’re doing it well?
[Read more…] about Member Training: Practical Advice for Establishing Reliability and Validity
by Audrey Schnell, PhD
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. [Read more…] about What Is Reliability and Why Does It Matter