Open Access. Powered by Scholars. Published by Universities.®
Articles 1 - 2 of 2
Full-Text Articles in Education
Acer Conquest: Generalised Item Response Modelling Software, Margaret Wu, Ray Adams, M Wilson
Acer Conquest: Generalised Item Response Modelling Software, Margaret Wu, Ray Adams, M Wilson
Prof Ray Adams
ACER Conquest is a computer program for fitting item response and latent regression models. It provides a comprehensive and flexible range of item response models to analysts, allowing them to examine the properties of performance assessment, traditional assessments and rating scales. This manual examines ACER ConQuest in detail, includes a tutorial and coverage of technical matters.
Measuring Individual Differences In Change With Multidimensional Rasch Models, W Wang, M Wilson, Ray Adams
Measuring Individual Differences In Change With Multidimensional Rasch Models, W Wang, M Wilson, Ray Adams
Prof Ray Adams
Item response models have been developed to explore change measurement, including those proposed by Fischer and his colleagues. In this article the authors propose another multidimensional Rasch model, the multidimensional random coefficient multinomial logit (MRCML) model. All these models are briefly reviewed and compared. The MRCML can be applied to not only polytomous items but also investigation of variations in item difficulties. Based on variations in difficulties across occasions and items, five kinds of models are proposed. Some simulation studies were conducted to examine parameter recovery of the MRCML model under various testing situations. All the parameters were recovered very …