This National Council on Measurement in Education (NCME) instructional module compares classical test theory and item response theory and describes their applications in test development. Related concepts, models, and methods are explored; and advantages and disadvantages of each framework are reviewed. (SLD)

This instructional module discusses the one-, two-, and three-parameter logistic item response theory (IRT) models. Mathematical formulas are given for each model and they are compared, with figures illustrating the effects of changing parameters. A single data set is used to demonstrate the effects of changing parameter values. (SLD)

This document, which was developed during a project to expand professional development opportunities for adult literacy practitioners affiliated with member agencies of Community Literacy of Ontario (CLO), presents tips and tools for developing and delivering an online workshop for literacy practitioners. The document begins with an overview of…