Web based system for cleaning and classifying open text fields
An Open Source, web based data cleaning and coding system. queXC takes a data file (such as questionnaire data) and cleans the text input fields by spacing and spell checking them. Operators then code text fields using new/existing coding schemes.
The new site is at http://psychometricon.net/libirt/
The new site is at http://psychometricon.net/libirt/
Library of functions to estimate the items and abilities from the responses of subjects to a questionnaire. The IRT models supported are the logistic model, the multivariate logistic model, the graded model and smoothing by penalization and kernel.
A set of applications that can generate and tabulate paper surveys. Includes simple graphical programs for the common user. Has interchangeable back-end components for the enthusiast.