Educational Testing and Psychometrics with R Package dexter

Session Type: Training Session

Abstract

Among the 250 core and regular packages listed in the psychometric view of CRAN, dexter stands out by offering a comprehensive system for the management and analysis of test data. This includes a solid SQL data base created automatically, numerous and advanced diagnostic techniques for items and tests, and efficient support for ability estimation (both standard and plausible value based). dexter can calibrate connected multi-booklet designs of great complexity, and analyze large data sets very fast. It includes many innovative techniques for DIF detection, equating, profile analysis, and more. An easy to use graphical interface is provided by the companion package dextergui, while another package, dexterMST, supports a version of multi-stage testing particularly attractive in the context of high stakes exams. dexter is appropriate for production purposes and actually used in production on a daily basis. It was published in the hope of making IRT more appropriate, attractive, and accessible for the many countries and testing establishment around the world that still rely exclusively on classical test theory and traditional equating methods.

Sub Unit

• Training Sessions

Session Organizer

• Ivailo Partchev, CITO

Presenter

• Ivailo Partchev, CITO