tag:crantastic.org,2005:/tags/ItemResponseTheoryLatest activity for ItemResponseTheory2009-08-12T12:59:23Zcrantastic.orgtag:crantastic.org,2005:TimelineEvent/811682018-10-30T15:15:23Z2018-10-30T15:15:23Zcrantastic_production tagged ltm with MissingData<a href="/users/146">crantastic_production</a> <span class="action">tagged</span> <a href="/packages/ltm">ltm</a> with <a href="/task_views/MissingData">MissingData</a>crantastic_productiontag:crantastic.org,2005:TimelineEvent/800942018-10-03T08:41:01Z2018-10-03T08:41:01ZeRm was upgraded to version 0.16-2<a href="/packages/eRm">eRm</a> was <span class="action">upgraded</span> to version <a href="/packages/eRm/versions/76407">0.16-2</a><br /><h3>Package description:</h3><p>Fits Rasch models (RM), linear logistic test models (LLTM), rating scale model (RSM), linear rating scale models (LRSM), partial credit models (PCM), and linear partial credit models (LPCM). Missing values are allowed in the data matrix. Additional features are the ML estimation of the person parameters, Andersen's LR-test, item-specific Wald test, Martin-Loef-Test, nonparametric Monte-Carlo Tests, itemfit and personfit statistics including infit and outfit measures, ICC and other plots, automated stepwise item elimination, simulation module for various binary data matrices.</p>crantastic.orgtag:crantastic.org,2005:TimelineEvent/794602018-09-14T05:41:42Z2018-09-14T05:41:42ZMCMCpack was upgraded to version 1.4-4<a href="/packages/MCMCpack">MCMCpack</a> was <span class="action">upgraded</span> to version <a href="/packages/MCMCpack/versions/75797">1.4-4</a><br /><h3>Package description:</h3><p>Contains functions to perform Bayesian inference using posterior simulation for a number of statistical models. Most simulation is done in compiled C++ written in the Scythe Statistical Library Version 1.0.3. All models return 'coda' mcmc objects that can then be summarized using the 'coda' package. Some useful utility functions such as density functions, pseudo-random number generators for statistical distributions, a general purpose Metropolis sampling algorithm, and tools for visualization are provided.</p>crantastic.orgtag:crantastic.org,2005:TimelineEvent/755712018-05-26T15:01:07Z2018-05-26T15:01:07ZeRm was upgraded to version 0.16-1<a href="/packages/eRm">eRm</a> was <span class="action">upgraded</span> to version <a href="/packages/eRm/versions/72139">0.16-1</a><br /><h3>Package description:</h3><p>Fits Rasch models (RM), linear logistic test models (LLTM), rating scale model (RSM), linear rating scale models (LRSM), partial credit models (PCM), and linear partial credit models (LPCM). Missing values are allowed in the data matrix. Additional features are the ML estimation of the person parameters, Andersen's LR-test, item-specific Wald test, Martin-Loef-Test, nonparametric Monte-Carlo Tests, itemfit and personfit statistics including infit and outfit measures, various ICC and related plots, automated stepwise item elimination, simulation module for various binary data matrices.</p>crantastic.orgtag:crantastic.org,2005:TimelineEvent/754452018-05-23T09:02:13Z2018-05-23T09:02:13Zlatdiag was upgraded to version 0.2-4<a href="/packages/latdiag">latdiag</a> was <span class="action">upgraded</span> to version <a href="/packages/latdiag/versions/72022">0.2-4</a><br /><h3>Package description:</h3><p>A graph proposed by Rosenbaum is useful for checking some properties of various sorts of latent scale, this program generates commands to obtain the graph using 'dot' from 'graphviz'.</p>crantastic.orgtag:crantastic.org,2005:TimelineEvent/750122018-05-15T08:01:53Z2018-05-15T08:01:53ZMCMCpack was upgraded to version 1.4-3<a href="/packages/MCMCpack">MCMCpack</a> was <span class="action">upgraded</span> to version <a href="/packages/MCMCpack/versions/71614">1.4-3</a><br /><h3>Package description:</h3><p>Contains functions to perform Bayesian inference using posterior simulation for a number of statistical models. Most simulation is done in compiled C++ written in the Scythe Statistical Library Version 1.0.3. All models return 'coda' mcmc objects that can then be summarized using the 'coda' package. Some useful utility functions such as density functions, pseudo-random number generators for statistical distributions, a general purpose Metropolis sampling algorithm, and tools for visualization are provided.</p>crantastic.orgtag:crantastic.org,2005:TimelineEvent/738612018-04-17T09:02:28Z2018-04-17T09:02:28Zltm was upgraded to version 1.1-1<a href="/packages/ltm">ltm</a> was <span class="action">upgraded</span> to version <a href="/packages/ltm/versions/70516">1.1-1</a><br /><h3>Package description:</h3><p>Analysis of multivariate dichotomous and polytomous data using latent trait models under the Item Response Theory approach. It includes the Rasch, the Two-Parameter Logistic, the Birnbaum's Three-Parameter, the Graded Response, and the Generalized Partial Credit Models.</p>crantastic.orgtag:crantastic.org,2005:TimelineEvent/724192018-03-11T08:21:00Z2018-03-11T08:21:00ZeRm was upgraded to version 0.16-0<a href="/packages/eRm">eRm</a> was <span class="action">upgraded</span> to version <a href="/packages/eRm/versions/69149">0.16-0</a><br /><h3>Package description:</h3><p>Fits Rasch models (RM), linear logistic test models (LLTM), rating scale model (RSM), linear rating scale models (LRSM), partial credit models (PCM), and linear partial credit models (LPCM). Missing values are allowed in the data matrix. Additional features are the ML estimation of the person parameters, Andersen's LR-test, item-specific Wald test, Martin-Loef-Test, nonparametric Monte-Carlo Tests, itemfit and personfit statistics including infit and outfit measures, various ICC and related plots, automated stepwise item elimination, simulation module for various binary data matrices.</p>crantastic.orgtag:crantastic.org,2005:TimelineEvent/706612018-01-21T19:41:40Z2018-01-21T19:41:40ZMCMCpack was upgraded to version 1.4-2<a href="/packages/MCMCpack">MCMCpack</a> was <span class="action">upgraded</span> to version <a href="/packages/MCMCpack/versions/67489">1.4-2</a><br /><h3>Package description:</h3><p>Contains functions to perform Bayesian inference using posterior simulation for a number of statistical models. Most simulation is done in compiled C++ written in the Scythe Statistical Library Version 1.0.3. All models return coda mcmc objects that can then be summarized using the coda package. Some useful utility functions such as density functions, pseudo-random number generators for statistical distributions, a general purpose Metropolis sampling algorithm, and tools for visualization are provided.</p>crantastic.orgtag:crantastic.org,2005:TimelineEvent/695532017-12-15T13:41:13Z2017-12-15T13:41:13Zirtoys was upgraded to version 0.2.1<a href="/packages/irtoys">irtoys</a> was <span class="action">upgraded</span> to version <a href="/packages/irtoys/versions/66475">0.2.1</a><br /><h3>Package description:</h3><p>A collection of functions useful in learning and practicing IRT, which can be combined into larger programs. Provides basic CTT analysis, a simple common interface to the estimation of item parameters in IRT models for binary responses with three different programs (ICL, BILOG-MG, and ltm), ability estimation (MLE, BME, EAP, WLE, plausible values), item and person fit statistics, scaling methods (MM, MS, Stocking-Lord, and the complete Hebaera method), and a rich array of parametric and non-parametric (kernel) plots. Estimates and plots Haberman's interaction model when all items are dichotomously scored.</p>crantastic.orgtag:crantastic.org,2005:TimelineEvent/691752017-12-05T13:21:18Z2017-12-05T13:21:18ZMCMCpack was upgraded to version 1.4-1<a href="/packages/MCMCpack">MCMCpack</a> was <span class="action">upgraded</span> to version <a href="/packages/MCMCpack/versions/66134">1.4-1</a><br /><h3>Package description:</h3><p>Contains functions to perform Bayesian inference using posterior simulation for a number of statistical models. Most simulation is done in compiled C++ written in the Scythe Statistical Library Version 1.0.3. All models return coda mcmc objects that can then be summarized using the coda package. Some useful utility functions such as density functions, pseudo-random number generators for statistical distributions, a general purpose Metropolis sampling algorithm, and tools for visualization are provided.</p>crantastic.orgtag:crantastic.org,2005:TimelineEvent/663102017-09-11T12:01:29Z2017-09-11T12:01:29Zltm was upgraded to version 1.1-0<a href="/packages/ltm">ltm</a> was <span class="action">upgraded</span> to version <a href="/packages/ltm/versions/63430">1.1-0</a><br /><h3>Package description:</h3><p>Analysis of multivariate dichotomous and polytomous data using latent trait models under the Item Response Theory approach. It includes the Rasch, the Two-Parameter Logistic, the Birnbaum's Three-Parameter, the Graded Response, and the Generalized Partial Credit Models.</p>crantastic.orgtag:crantastic.org,2005:TimelineEvent/632072017-06-05T18:41:19Z2017-06-05T18:41:19ZMCMCpack was upgraded to version 1.4-0<a href="/packages/MCMCpack">MCMCpack</a> was <span class="action">upgraded</span> to version <a href="/packages/MCMCpack/versions/60446">1.4-0</a><br /><h3>Package description:</h3><p>Contains functions to perform Bayesian inference using posterior simulation for a number of statistical models. Most simulation is done in compiled C++ written in the Scythe Statistical Library Version 1.0.3. All models return coda mcmc objects that can then be summarized using the coda package. Some useful utility functions such as density functions, pseudo-random number generators for statistical distributions, a general purpose Metropolis sampling algorithm, and tools for visualization are provided.</p>crantastic.orgtag:crantastic.org,2005:TimelineEvent/618962017-04-26T16:41:36Z2017-04-26T16:41:36Zplink was upgraded to version 1.5-1<a href="/packages/plink">plink</a> was <span class="action">upgraded</span> to version <a href="/packages/plink/versions/59190">1.5-1</a><br /><h3>Package description:</h3><p>Item response theory based methods are used to compute linking constants and conduct chain linking of unidimensional or multidimensional tests for multiple groups under a common item design. The unidimensional methods include the Mean/Mean, Mean/Sigma, Haebara, and Stocking-Lord methods for dichotomous (1PL, 2PL and 3PL) and/or polytomous (graded response, partial credit/generalized partial credit, nominal, and multiple-choice model) items. The multidimensional methods include the least squares method and extensions of the Haebara and Stocking-Lord method using single or multiple dilation parameters for multidimensional extensions of all the unidimensional dichotomous and polytomous item response models. The package also includes functions for importing item and/or ability parameters from common IRT software, conducting IRT true score and observed score equating, and plotting item response curves/surfaces, vector plots, information plots, and comparison plots for examining parameter drift.</p>crantastic.orgtag:crantastic.org,2005:TimelineEvent/612552017-04-07T17:41:28Z2017-04-07T17:41:28Zplink was upgraded to version 1.5-0<a href="/packages/plink">plink</a> was <span class="action">upgraded</span> to version <a href="/packages/plink/versions/58585">1.5-0</a><br /><h3>Package description:</h3><p>Item response theory based methods are used to compute linking constants and conduct chain linking of unidimensional or multidimensional tests for multiple groups under a common item design. The unidimensional methods include the Mean/Mean, Mean/Sigma, Haebara, and Stocking-Lord methods for dichotomous (1PL, 2PL and 3PL) and/or polytomous (graded response, partial credit/generalized partial credit, nominal, and multiple-choice model) items. The multidimensional methods include the least squares method and extensions of the Haebara and Stocking-Lord method using single or multiple dilation parameters for multidimensional extensions of all the unidimensional dichotomous and polytomous item response models. The package also includes functions for importing item and/or ability parameters from common IRT software, conducting IRT true score and observed score equating, and plotting item response curves/surfaces, vector plots, information plots, and comparison plots for examining parameter drift.</p>crantastic.orgtag:crantastic.org,2005:TimelineEvent/588962017-01-26T20:01:09Z2017-01-26T20:01:09ZMCMCpack was upgraded to version 1.3-9<a href="/packages/MCMCpack">MCMCpack</a> was <span class="action">upgraded</span> to version <a href="/packages/MCMCpack/versions/56417">1.3-9</a><br /><h3>Package description:</h3><p>Contains functions to perform Bayesian inference using posterior simulation for a number of statistical models. Most simulation is done in compiled C++ written in the Scythe Statistical Library Version 1.0.3. All models return coda mcmc objects that can then be summarized using the coda package. Some useful utility functions such as density functions, pseudo-random number generators for statistical distributions, a general purpose Metropolis sampling algorithm, and tools for visualization are provided.</p>crantastic.orgtag:crantastic.org,2005:TimelineEvent/569272016-11-20T19:20:33Z2016-11-20T19:20:33ZeRm was upgraded to version 0.15-7<a href="/packages/eRm">eRm</a> was <span class="action">upgraded</span> to version <a href="/packages/eRm/versions/54548">0.15-7</a><br /><h3>Package description:</h3><p>Fits Rasch models (RM), linear logistic test models (LLTM), rating scale model (RSM), linear rating scale models (LRSM), partial credit models (PCM), and linear partial credit models (LPCM). Missing values are allowed in the data matrix. Additional features are the ML estimation of the person parameters, Andersen's LR-test, item-specific Wald test, Martin-Lf-Test, nonparametric Monte-Carlo Tests, itemfit and personfit statistics including infit and outfit measures, various ICC and related plots, automated stepwise item elimination, simulation module for various binary data matrices.</p>crantastic.orgtag:crantastic.org,2005:TimelineEvent/562492016-10-27T09:40:58Z2016-10-27T09:40:58ZMCMCpack was upgraded to version 1.3-8<a href="/packages/MCMCpack">MCMCpack</a> was <span class="action">upgraded</span> to version <a href="/packages/MCMCpack/versions/53929">1.3-8</a><br /><h3>Package description:</h3><p>Contains functions to perform Bayesian inference using posterior simulation for a number of statistical models. Most simulation is done in compiled C++ written in the Scythe Statistical Library Version 1.0.3. All models return coda mcmc objects that can then be summarized using the coda package. Some useful utility functions such as density functions, pseudo-random number generators for statistical distributions, a general purpose Metropolis sampling algorithm, and tools for visualization are provided.</p>crantastic.orgtag:crantastic.org,2005:TimelineEvent/560282016-10-19T22:41:06Z2016-10-19T22:41:06Zlatdiag was upgraded to version 0.2-3<a href="/packages/latdiag">latdiag</a> was <span class="action">upgraded</span> to version <a href="/packages/latdiag/versions/53734">0.2-3</a><br /><h3>Package description:</h3><p>A graph proposed by Rosenbaum is useful for checking some properties of various sorts of latent scale, this program generates commands to obtain the graph using 'dot' from 'graphviz'.</p>crantastic.orgtag:crantastic.org,2005:TimelineEvent/556912016-10-10T12:01:01Z2016-10-10T12:01:01Zirtoys was upgraded to version 0.2.0<a href="/packages/irtoys">irtoys</a> was <span class="action">upgraded</span> to version <a href="/packages/irtoys/versions/53459">0.2.0</a><br /><h3>Package description:</h3><p>A collection of functions useful in learning and practicing IRT, which can be combined into larger programs. Provides basic CTT analysis, a simple common interface to the estimation of item parameters in IRT models for binary responses with three different programs (ICL, BILOG-MG, and ltm), ability estimation (MLE, BME, EAP, WLE, plausible values), item and person fit statistics, scaling methods (MM, MS, Stocking-Lord, and the complete Hebaera method), and a rich array of parametric and non-parametric (kernel) plots. Estimates and plots Haberman's interaction model when all items are dichotomously scored.</p>crantastic.orgtag:crantastic.org,2005:TimelineEvent/542522016-08-21T09:21:03Z2016-08-21T09:21:03ZMCMCpack was upgraded to version 1.3-7<a href="/packages/MCMCpack">MCMCpack</a> was <span class="action">upgraded</span> to version <a href="/packages/MCMCpack/versions/52081">1.3-7</a><br /><h3>Package description:</h3><p>Contains functions to perform Bayesian inference using posterior simulation for a number of statistical models. Most simulation is done in compiled C++ written in the Scythe Statistical Library Version 1.0.3. All models return coda mcmc objects that can then be summarized using the coda package. Some useful utility functions such as density functions, pseudo-random number generators for statistical distributions, a general purpose Metropolis sampling algorithm, and tools for visualization are provided.</p>crantastic.orgtag:crantastic.org,2005:TimelineEvent/504102016-04-15T06:41:08Z2016-04-15T06:41:08ZMCMCpack was upgraded to version 1.3-6<a href="/packages/MCMCpack">MCMCpack</a> was <span class="action">upgraded</span> to version <a href="/packages/MCMCpack/versions/48740">1.3-6</a><br /><h3>Package description:</h3><p>Contains functions to perform Bayesian inference using posterior simulation for a number of statistical models. Most simulation is done in compiled C++ written in the Scythe Statistical Library Version 1.0.3. All models return coda mcmc objects that can then be summarized using the coda package. Some useful utility functions such as density functions, pseudo-random number generators for statistical distributions, a general purpose Metropolis sampling algorithm, and tools for visualization are provided.</p>crantastic.orgtag:crantastic.org,2005:TimelineEvent/495182016-03-14T17:00:50Z2016-03-14T17:00:50Zlatdiag was upgraded to version 0.2-2<a href="/packages/latdiag">latdiag</a> was <span class="action">upgraded</span> to version <a href="/packages/latdiag/versions/47880">0.2-2</a><br /><h3>Package description:</h3><p>A graph proposed by Rosenbaum is useful for checking some properties of various sorts of latent scale, this program generates commands to obtain the graph using 'dot' from 'graphviz'.</p>crantastic.orgtag:crantastic.org,2005:TimelineEvent/480302016-03-11T16:22:55Z2016-03-11T16:22:55ZMCMCpack was upgraded to version 1.3-5<a href="/packages/MCMCpack">MCMCpack</a> was <span class="action">upgraded</span> to version <a href="/packages/MCMCpack/versions/47755">1.3-5</a><br /><h3>Package description:</h3><p>Contains functions to perform Bayesian inference using posterior simulation for a number of statistical models. Most simulation is done in compiled C++ written in the Scythe Statistical Library Version 1.0.3. All models return coda mcmc objects that can then be summarized using the coda package. Some useful utility functions such as density functions, pseudo-random number generators for statistical distributions, a general purpose Metropolis sampling algorithm, and tools for visualization are provided.</p>crantastic.orgtag:crantastic.org,2005:TimelineEvent/478052016-03-03T05:11:42Z2016-03-03T05:11:42Zlordif was upgraded to version 0.3-3<a href="/packages/lordif">lordif</a> was <span class="action">upgraded</span> to version <a href="/packages/lordif/versions/47559">0.3-3</a><br /><h3>Package description:</h3><p>Analysis of Differential Item Functioning (DIF) for dichotomous and polytomous items using an iterative hybrid of ordinal logistic regression and item response theory (IRT).</p>crantastic.org