ACER ConQuest

Author: Raymond J. Adams, Margaret L. Wu, Mark R. Wilson.
Contact: http://acer-conquest.software.informer.com/
Description: ACER ConQuest 4 is a computer program for fitting both unidimensional and multidimensional item response and latent regression models. It provides data analysis based on a comprehensive and flexible range of item response models (IRM), allowing examination of the properties of performance assessments, traditional assessments and rating scales. ACER ConQuest 4 also offers wider measurement and research community analysis procedures based on the most up-to-date psychometric methods of multifaceted item response models, multidimensional item response models, latent regression models and drawing plausible values.
System Requirements: Windows, Macs running Windows 32- & 64-bit versions
Documentation: demo version & tutorials trial version available