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!”

Adrift at “C” with IRT

For the past three decades we have weathered the storm of test-based accountability in a skiff called IRT. Buttressed only with a few psychometric tools, loosely defined unidimensional latent constructs, and the promise of measurement invariance we have been buffeted by wind and waves, sometimes taking on water, sometimes finding ourselves run aground in shallowContinue reading “Adrift at “C” with IRT”

We’ve Come A Long Way, Baby!

It’s Saturday morning. The weekend lies before me. We might take the yacht up the river and allow ourselves to be enraptured by the foliage as it envelops us, or head over to the club for some golf, tennis, or one of the other myriad activities that well-to-do white folks engage in before ski season.Continue reading “We’ve Come A Long Way, Baby!”

Render Unto Caesar What Is Caesar’s

How do you innovate in large-scale state testing while continuing to meet federal assessment and accountability requirements? That, essentially, was the question addressed by the Center for Assessment team and state leaders in the final session of the Center’s virtual Reidy Interactive Lecture Series (RILS). Specifically, the session featured interviews with leaders in states currentlyContinue reading “Render Unto Caesar What Is Caesar’s”