Measurement Resources from The Arcturus Group
CAT tutorial - Here you will have the opportunity to learn the logic of CAT and see the calculations that go on behind the
scenes. You can play with an actual CAT. We provide the items and the correct answers. You can try different scenarios and see what happens. You can pretend you are a high ability,
average or low ability examinee. You can intentionally miss easy items. You can get items right that should be very hard for you.
IRT page - Resources to help you learn more about Item Response theory. Featured is a no-cost, on-line version of Baker, F. (2001) Basics of Item Response Theory and accompanying software. Links and other resources are provided.
Meta Analysis Page - Meta-analysis refers to the analysis of analyses...the statistical analysis of a large collection of analysis results from individual studies for the purpose of integrating the findings. (Glass, 1976, p. 3) This page is intended to help you learn more about meta-analysis by providing you with an overview; links to relevant documents and resources; and free, high-quality software.
MDT page - Measurement decision theory is a measurement model for classifying examinees based on statistical decision theory. The model is, in many ways superior to Item Response Theory when the goal is simply classification. This page presents the model and features an interactive module which allows you to try different inputs and see the resulting decisions. Additional resources are provided.
BETSY - Bayesian Essay Test Scoring sYstem - A research project for automated essay scoring. Downloadable software is available for research use.
Favorite Measurement Links
PARE - Practical Assessment Research and Evaluation - the most widely read journal in educational measurement, evaluation and research
CAT Central - David Weiss, one of the pioneers in Computer Adaptive Testing has launched this website which features a massive bibliography, over 100 full-text articles, descriptions of programs, resources and more. This is well worth checking out.