Matrix Sampling: Resurrected

It is impossible to read an article or hear a presentation about the future of large-scale state testing without some discussion of matrix sampling. If your primary concerns about large-scale testing are time and cost, the answer is matrix sampling. If your primary concern is coverage of comprehensive and complex standards like the Next GenerationContinue reading “Matrix Sampling: Resurrected”

Reliability: Measurement’s Middle Child

Validity. Reliability. Fairness. Reliability is one of the big three foundations of educational measurement and testing. It’s right up there with a chapter of its own in the Part 1 of the joint Standards along with Validity and Fairness. We’re supposed to love and respect them all the same. But we all know that ReliabilityContinue reading “Reliability: Measurement’s Middle Child”

Vive La Variance!

To educate is to change. Instruction and learning are about change. Educational measurement is defined by variance. Literally. The fundamental concepts in the field are expressed in terms of variance. One of the first techniques that we learn as eager young graduate students is analysis of variance. Without variance, our lives as psychometricians, much likeContinue reading “Vive La Variance!”