EstCRM_1.6 (2022-9-12) * CRAN errors on html manual are fixed EstCRM_1.5 (2022-6-13) * Maintainer contact information is updated EstCRM_1.4 (2015-7-11) * The previous versions of EstCRMitem function only estimated item parameters using Shojima's simplified EM algorithm. Now, a new argument is added to the function such that the user can also choose Wang & Zeng's algorithm when estimating item parameters. In addition, a new argument is added for the Wang & Zeng algorithm. If BFGS is TRUE, Broyden?Fletcher?Goldfarb?Shanno (BFGS) algorithm is used to approximate the Hessian at each cycle. If BFGS is FALSE, Hessian is directly computed at each cycle. * The EstCRMitem item function is updated such that it returns the standard error of the item parameter estimates. EstCRM_1.3 (2012-07-28) * Small changes are added to printing the EstCRMitem output. EstCRM_1.2 (2012-02-2) * A new function bootCRM() is added to estimate the standard errors of item parameter estimates using non-parameteric bootstrap sampling EstCRM_1.1 (2011-06-17) * DESCRIPTION and Rd files are updated * A new dataset (SelfEff) and sample R codes to analyze the new dataset are added EstCRM_1.0 (2011-06-15) * initial release on CRAN