About 45 R packages to analyze data using item response theory (IRT) have been developed over the last decade. This article introduces these 45 R packages with their descriptions and features. It also describes possible advanced IRT models using R packages, as well as dichotomous and polytomous IRT models, and R packages that contain applications…

The disadvantages of the usual linear least-squares analysis of first- and second-order kinetic data are described, and nonlinear least-squares fitting is recommended as an alternative.

A response is made to a paper that urges the use of the Rasch model for educational assessment. This paper argues that the model is inadequate and that claims for its efficacy are exaggerated and technically weak.

This paper developed a Democratic Classroom Survey to measure students' perceived democratic environment of the classroom. Perceived democratic environment is one of the most important variables for understanding classroom activity and indeed any type of group activity, but actually measuring perceptions in an objective manner has been…

The purpose of the NMSBA technical report is to provide users and other interested parties with a general overview of and technical characteristics of the 2007 NMSBA. The 2007 technical report contains the following information: (1) Test development; (2) Scoring procedures; (3) Summary of student performance; (4) Statistical analyses of item and…

The purpose of the NMSBA technical report is to provide users and other interested parties with a general overview of and technical characteristics of the 2006 NMSBA. The 2006 technical report contains the following information: (1) Test development; (2) Scoring procedures; (3) Calibration, scaling, and equating procedures; (4) Standard setting;…