NEWS

sirt 1.14

NOTE * changed output of 'sim.raschtype' which is now of class data frame

NOTE * added a not in 'lsem.estimate' that the model syntax should be

always specified in an object lavmodel (thanks to a communicated problem of Jenny Wagner)

NOTE * included utility function 'mcmc_Rhat' for computation of the

Rhat statistic from a single chain

NOTE * added statistics of average conditional covariances and MADCOV

in 'conf.detect' and 'expl.detect'. An example for DETECT analysis for simulated unidimensional data has been included (Example 3) which shows that DETECT can become negative (motivated by discussions with Berend Terluin, Weiyi Cheng, Yifan Liu and Yunfei Chang)

NOTE * added summary method for 'conf.detect

NOTE * disabled default fixed seed in 'expl.detect

DATA * included/modified datasets:

EXAMP * included/modified examples: mcmc_Rhat (1), conf.detect (3

sirt 1.13

FIXED * fixed a bug in 'conf.detect' and 'expl.detect' with too few

items (routine crashed, thanks to Berend Terluin)

FIXED * fixed a bug in data preprocessing in 'mlnormal' function

NOTE * included reference to subscore package in 'prmse.subscores.scales

NOTE * extended output values in 'categorize' function

NOTE * added arguments for boundary values of a, b, c and d parameters

in noncompensatory IRT model function 'smirt' (requested by Chia-Ling Hsu)

ADDED * added robust linking method for multiple studies based on bisquare

robust regression estimation in 'linking.haberman'. In addition, a summary method has been added.

NOTE * included functions 'starts_cov' and 'starts_sim1dim' for the

STARTS model of Kenny and Zautra

DATA * included/modified datasets:

EXAMP * included/modified examples: mlnormal (3), linking.haberman (5

starts_cov (1)

sirt 1.12

NOTE * included utility function 'prior_model_parse' for convenient

specifications of priors for the 'amh' function

NOTE * included utility function 'loglike_mvnorm' for calculation

of log-likelihood for a multivariate normal distribution based on sufficient statistics

ADDED * added deterministic optimization for Bayesian model estimation

in the function 'pmle' (penalized maximum likelihood estimation). See the 'amh' help page.

NOTE * fixed a bug in LSEM plot function for subsets of parameters

(thanks to Johanna Hartung)

NOTE * corrected a bug in Example 1 in 'equating.rasch'

(thanks to Kelvin Gregory)

NOTE * changed labelling of response pattern in 'md.pattern.sirt

to integers

NOTE * included example in 'nedelsky-methods' for fitting the Nedelsky

model with xxirt function

NOTE * added history of adaptive proposal standard deviations in

'amh' function in output

NOTE * added sampled parameter vector with highest value of posterior

distribution in 'amh' for comparison with 'pmle' function

NOTE * added comparison of MAP, multivariate MAP and mean estimator

in 'amh' in value 'comp_estimators'. Now also included in 'summary.amh'.

NOTE * Defunct functions: 'rasch.conquest', 'rasch.pml2' , 'yen.q3

'testlet.yen.q3'

NOTE * included utility functions 'CallSwitch' and 'parmsummary_extend

NOTE * included utility functions 'pow', 'tracemat', 'soft_thresholding

'hard_thresholding', 'bounds_parameters', 'dimproper', 'ginverse_sym' (see '?sirt-utilities')

ADDED * included estimation routine 'mlnormal' for (restricted) maximum

likelihood estimation for mean and covariance structures for a multivariate normal distribution (e.g. multilevel models, factor analysis, structural equation models, multilevel structural equation models, social relations model, ...). Prior distribution and lasso penalities are also accomodated.

DATA * included/modified datasets:

EXAMP * included/modified examples: prior_model_parse (1

loglike_mvnorm (1), amh (1), equating.rasch (1), amh (1), nedelsky-methods (1), sirt-utilities (1,2,3,4), parmsummary_extend (1), mlnormal (1,2)

sirt 1.11

FIXED * fixed a bug in 'mirt.wrapper.coef' which occured due to

changes in output structures of mirt package

ADDED * added user defined item response model estimation 'xxirt' with

corresponding S3 methods

ADDED * added experimental adaptive Metropolis-Hastings routine 'amh

with corresponding S3 methods

ADDED * added utility functions for objects of class 'mcmc.list' (from

coda package): 'mcmc_coef', 'mcmc_vcov', ..., 'mcmc_WaldTest'

NOTE * included inverse gamma distribution ('rinvgamma2') with

parametrization in prior sample size and prior variance

DATA * included/modified datasets:

EXAMP * included/modified examples: rasch.jml (1), xxirt (1,2

xxirt_createParTable (1), xxirt_createThetaDistribution (1), amh (1,2), mcmc_coef (1), rinvgamma2 (1)

sirt 1.10

FIXED * fixed a bug in summary function of MCMC based item

response models (thanks to Andres Burga)

FIXED * fixed a bug in 'rasch.mml2' when using the 'center.b

argument (thanks to Sarah Thomas)

NOTE * renamed functions 'yen.q3' into 'Q3' and 'testlet.yen.q3

into 'Q3.testlet'. The old function names can still be used.

NOTE * included argument 'standardized' in 'lsem.estimate' which

adds standardized solutions in the output using 'lavaan::standardizedSolution' (thanks to Janina Kuenecke)

NOTE * cleaned namespace file and defined imported functions

in a more explicit way

DATA * included/modified datasets:

EXAMP * included/modified examples: lsem.estimate (1

sirt 1.9

NOTE * allows thinning in 'plot.mcmc.sirt' function

NOTE * fixed a minor bug in summary output of 'rasch.mml2' for

irtmodel='missing1'

NOTE * included argument 'zerosum' in 'rasch.pairwise' and

'rasch.pairwise.itemcluster' to apply a zero sum constraint of for item difficulties (suggested by Chen-Wei Liu)

NOTE * included example for bootstrapping standard errors for

'rasch.pairwise' (suggested by Chen-Wei Liu)

DATA * included/modified datasets:

EXAMP * included/modified examples: rasch.pairwise (1

dif.logistic.regression (2)

sirt 1.8

NOTE * corrected a non-working example in 'lsem.estimate'

(thanks to Takuya Yanagida)

NOTE * changed defaults and outputs in 'mcmc.list.descriptives

and 'plot.mcmc.sirt'

ADDED * included argument 'est.delta' in 'rasch.mml2' for item specific

estimation of delta parameters in irtmodel='missing1'. Now, the specification of est.delta has slightly been changed.

ADDED * included function 'likelihood.adjustment' for adjusting

individual likelihood

NOTE * disabled the broken plot method for 'noharm.sirt' objects

DATA * included/modified datasets:

EXAMP * included/modified examples: lsem.estimate (1

rasch.mml2 (7.12-14, 8), likelihood.adjustment (1)

sirt 1.7

ADDED * included function 'btm' for estimating an extended Bradley-Terry

model (suggested and fixed by Chris Weadon)

NOTE * added minimum and maximum values in summary of 'lsem.estimate

NOTE * included JML estimation of Bradley-Terry model ('btm') with

elimination of persons with extreme scores

NOTE * included infit and outfit statistics in 'btm

NOTE * changed layout of summary of 'lsem.estimate' and

'plot.lsemPermutationTest'

NOTE * added separation index for Bradley-Terry model

(suggested by Sven De Maeyer)

FIXED * fixed a bug in 'categorize' function

DATA * included/modified datasets: data.pw01

EXAMP * included/modified examples: btm (1,2

sirt 1.6

NOTE * added arguments 'minnode' and 'maxnode' in 'R2conquest' which

now allows full specification for the theta grid used in numerical approximation

FIXED * fixed a bug in 'truescore.irt' when no standard errors were provided

ADDED * added utility functions 'categorize' and 'decategorize' for

categorizing variables in a data frame

ADDED * added function 'lsem.estimate' for fitting local structural

equation models (LSEM). In addition, the permutation test is implemented in 'lsem.permutationTest'.

DATA * included/modified datasets: data.lsem01

EXAMP * included/modified examples: categorize (1,2), lsem.estimate (1

sirt 1.4

NOTE * changed default for argument 'itemcodes' in R2conquest fuction

NOTE * included S3 methods for probabilistic Guttman model 'prob.guttman

ADDED * included plot method for hierarchical rater model 'rm.sdt

NOTE * changed calculation of transformed parameters in 'rm.sdt

FIXED * fixed a bug in 'rm.sdt' for datasets with differing number of

item categories

ADDED * added option for specifying a discrete latemt variable in

'rm.sdt' function. Options for fixed item parameters were also added.

NOTE * added arguments for bounds of item slope and item difficulty

parameters in 'rasch.mml2' (requested by Aysenur Erdemir)

ADDED * added option for estimating the missingness delta parameter

in 'rasch.mml2' and 'irtmodel="missing1"'

FIXED * fixed a bug in 'rasch.mml2' for missing data models and

included CALL in summary

FIXED * corrected missing output of individual likelihood and posterior

in 'rasch.mml2' for irtmodel='missing1'

DATA * included/modified datasets: data.bs07a

EXAMP * included/modified examples: data.eid (4.3a

data.read (8e,9a), data.bs (07a), rm.sdt (2,3), rasch.mml2 (1,7)

sirt 1.3 (2015-01-06)

NOTE * defined several S3 methods for 'rasch.copula2' and

'rasch.copula3'

NOTE * adapted S3 methods for mirt because the new class

'SingleGroupClass' is defined in mirt >= 1.7 and removed 'ConfirmatoryClass' and 'ExploratoryClass' methods

NOTE * exported the object pcm.fit (it was spuriously

non-exported in sirt 1.2; reported by Sven Liepertz)

NOTE * included the argument 'ignore.pid' for ignoring person

identifiers in 'R2conquest' function (suggested by Kelvin Gregory)

NOTE * changed Example 1 in 'f1d.irt' due to a change in

Suggests regarding the MASS package in the psych package which caused an error in CRAN checks (suggested by William Revelle)

ADDED * included S3 methods logLik, IRT.likelihood, IRT.posterior

IRT.modelfit, summary.IRT.modelfit and IRT.irfprob for functions 'rasch.mml2', 'smirt', 'rasch.mirtlc', 'gom', 'rm.facets' and 'rm.sdt'

NOTE * extended modelfit.sirt for objects of class gom

ADDED * included function 'modelfit.cor.poly' for assessing

absolute model fit for polytomous item responses

ADDED * included arguments for fixing item and rater parameters in

'rm.facets'

ADDED * included IRT.factor.scores method for 'rm.facets' and

'rm.sdt'

ADDED * included function 'IRT.mle' for estimating MLE, WLE and

MAP factor scores with user defined item response functions

DATA * included/modified datasets:

EXAMP * included/modified examples: f1d.irt (1), rasch.mml2 (1

rasch.mirtlc (1), gom.em (1), rm.facets (2), IRT.mle (1,2,3)

sirt 1.2 (2014-12-12)

NOTE * included standard errors of WLE parameters in 'wle.rasch

NOTE * corrected formulas help file for 'pcm.conversion

(thanks to Thomas Kiefer)

FIXED * fixed computational problems for calculating tetrachoric

correlation with empty cells in 'tetrachoric2' resp. 'polychoric2' (method of Olsson; thanks to a dataset privided by Ulrike Kipman)

NOTE * included S3 methods IRT.likelihood, IRT.posterior and

IRT.irfprob for two classes (ConfirmatoryClass and ExploratoryClass) of mirt objects

ADDED * included item and person fit statistic in 'pcm.fit'

for the partial credit model (suggested by Hiroyuki Yamada and Sven Liepertz)

NOTE * included C-test dataset 'data.g308' from

Schroeders et al. (2014)

NOTE * included several examples from the book of Eid

and Schmidt: "Testtheorie und Testkonstruktion", see data.eid

DATA * included/modified datasets: data.g308, data.eid

EXAMP * included/modified examples: pcm.conversion (1

pcm.fit (1,2,3), brm.sim (1), data.g308 (1), data.eid (1,2)

sirt 1.1 (2014-11-23)

NOTE * included arguments for mean and covariance matrix for

confirmatory multidimensional models in 'f1d.irt'

NOTE * removed 'lavaanify.sirt' from sirt package and

included this function as 'lavaanify.IRT' in TAM package

FIXED * fixed a bug in 'lavaan2mirt' (thanks to Hong Giang Pham)

NOTE * extended some person fit statistics to handle datasets

with missing responses (thanks to Hiroyuki Yamada)

ADDED * included functions for estimating the Beta item

response model for continuous item responses

DATA * included/modified datasets:

EXAMP * included/modified examples: f1d.irt (2), brm.sim (1

sirt 1.0

NOTE * included argument 'progress' in 'gom.em' for optional

printing of iteration progress

NOTE * disabled warnings produced in 'rasch.mirtlc' by the glm

function

FIXED * fixed a bug in calculating the posterior in 'mirt.wrapper

for nonlinear item response models

FIXED * fixed a bug in running exploratory factor analysis with

one dimension in noharm.sirt (thanks to Russell Zheng)

FIXED * fixed a bug in datawide2long with Q-matrix input

FIXED * fixed a bug in data handling in 'invariance.alignment

with some missing intercepts and slopes

ADDED * included an extension of lavaan syntax to accomodate

guessing and slipping parameters and "__" (item shortage declaration) -> function 'lavaanify.sirt' The function lavaan2mirt also includes these options.

NOTE * included coef and vcov method for function 'rasch.evm.pcm

NOTE * included argument weights in 'dirichlet.mle

NOTE * included utility function for conversion of different

parameterizations in partial credit model

NOTE * included helper function 'mirt.wrapper.itemplot'

NOTE * enabled progress argument in rasch.copula functions

NOTE * renamed DeCarlo's hierarchical rater model based on

signal detection theory 'rm.hrm' into 'rm.sdt'

NOTE * fixed an error in description of missing IRT models in

'rasch.mml2.Rd' (thanks to Carmen Koehler)

NOTE * fixed a bug in 'tam2mirt' for polytomous items

(thanks to Michal Modzelewski)

ADDED * included function 'mirt.specify.partable' for modifying

a parameter table in mirt package

NOTE * included argument item type for polytomous data in 'lavaan2mirt

NOTE * updated 'lavaanify.sirt' function because of changes in

the lavaan::lavaanify function from lavaan 0.5-16 to the lavaan 0.5-17 package

NOTE * changed mean constraint for rater parameters in 'rm.facets'

ADDED * included estimation and simulation functions for the Nedelsky model

('nedelsky.sim', 'nedelsky.irf')

DATA * included/modified datasets: data.ratings2, data.si06, data.ratings3

EXAMP * included/modified examples: dirichlet.simul (1,2

data.read (2), mirt.model.vars (1), rasch.mirtlc (4), data.long (3,4), lavaanify.sirt (1), lavaan2mirt (1), dirichlet.mle (1,2), pcm.conversion (1), data.big5 (1), mirt.specify.partable (1), nedelsky-methods (1,2)

sirt 0.47

ADDED * included wrapper function of mirt output of extracting

item parameters ('mirt.wrapper.coef')

EXAMP * added more examples for model estimation in mirt package

using customized item response functions and/or customized latent structure distributions o Ramsay's quotient model ('sim.qm.ramsay', Example 1) o Latent class analysis ('data.read', Model 7) o Mixed Rasch model ('data.read', Model 8) o Located latent class model/Latent class IRT model ('data.read', Model 12; 'rasch.mirtlc', Example 4, Model 4) o Probabilistic Guttman model ('prob.guttman', Example 1, Model 3) o Nonparametric item response model with monotone item response functions ('prob.guttman', Example 4, Model 4) o Discrete grade of membership model ('gom.em', Simulated Example 2, Model 2m) o Multimensional item response model with discrete traits ('data.read', Model 13) o DINA model ('data.read', Model 14) o Rasch copula model ('rasch.copula2', Example 5) o Rasch model with non-normal distibution ('data.read', Model 15)

ADDED * included wrapper function of mirt output for extracting

likelihood, posterior and expected counts

ADDED * extended modelfit.sirt for fitted objects from mirt package

ADDED * included function 'lavaan2mirt' for converting syntax for the

lavaan package to syntax for the mirt package

ADDED * included function 'tam2mirt' for converting a fitted object

in TAM package into an object of class mirt in the mirt package

NOTE * corrected some typos and improved some examples (thanks to Phil Chalmers

EXAMP * included an example for running Mplus from within R using the

MplusAutomation package ('data.read', Model 1)

NOTE * renamed functionrasch.conquest into R2conquest -> function rasch.conquest

can still be used

ADDED * included function 'mirt.wrapper.fscores' for computing EAPs, MAPs and MLEs

for objects of class mirt

DATA * included/modified datasets:

EXAMP * included/modified examples: mirt.wrapper (1,2,3,4,5

sim.qm.ramsay (1), modelfit.sirt (1), data.read (1,3,7,8,12,13,14), lavaan2mirt (1,2,3), tam2mirt (1,2,3,4), prob.guttman (1), gom.em (2), equating.rasch (1), data.reck (2), rasch.mirtlc (4), rasch.copula2 (5)

sirt 0.46

NOTE * used the operator '::' for functions which are used from

other packages than sirt in example files for datasets

FIXED * fixed a bug in plot.noharm.sirt for unidimensional models

NOTE * fixed a minor bug in summary in 'summary.rasch.pml2

NOTE * included argument 'use.maxincrement' for controlling

increments in 'rasch.pml3'

NOTE * speeded invariance alignment function and choose now

different starting values to ensure a global minimum. Changed also default parameters to obtain more stable results.

NOTE * excluded plotting function of 'invariance.alignment

NOTE * changed calculation of measures of noninvariance in

invariance.alignment. Now, the noninvariance measures in 'invariance.alignment' and 'linking.haberman' are equivalent.

DATA * included/modified datasets:

EXAMP * included/modified examples: data.read, data.big5

invariance.alignment (4,5)

sirt 0.45

FIXED * fixed a bug in reliability calculation in noharm.sirt

NOTE * included plots for 'noharm.sirt' using the semPlot package

ADDED * included first version of statistical implicative analysis ('sia.sirt

ADDED * included function 'rasch.conquest' for running ConQuest from within R

DATA * included/modified datasets:

EXAMP * included/modified examples: data.mixed1, noharm.sirt (1,2

sia.sirt (1), data.read, rasch.evm.pcm (4)

sirt 0.44

FIXED * fixed a bug in calculation of marginal parameters for testlet model

ADDED * included the partially compensatory item response model

(irtmodel='partcomp' in 'smirt')

NOTE * speeded 'rasch.copula' functions a bit

NOTE * included argument 'increment.factor' in rasch.copula to improve

convergence behavior

FIXED * fixed a bug in 'rasch.mirtlc' in saved parameter estimates for

models with different initial estimates (n.starts>0)

ADDED * included function for calculating marginal item parameters for

testlet (bifactor) model ('testlet.marginalized')

ADDED * extended 'modelfit.sirt' for objects of class tam.mml, tam.mml.2pl

and tam.fa (from the TAM package)

FIXED * fixed a bug in parsing residual matrix from NOHARM output in 'R2noharm

NOTE * extended output in mcmc.list. descriptives

NOTE * changed chi square p value in R2noharm in Values according to summary

ADDED * included R implementation of NOHARM ('noharm.sirt

NOTE * modelfit.sirt also allows for objects of class noharm.sirt

NOTE * included Divgi estimation method of tetrachoric correlation

ADDED * included maximum likelihood estimation of polychoric correlation

DATA * included/modified datasets:

EXAMP * included/modified examples: data.wide2long (1), smirt (3), modelfit.sirt (1

R2noharm (4), mcmc.list.descriptives (1), noharm.sirt (1,2), data.read, tetrachoric (2), polychoric2 (1)

sirt 0.43

ADDED * included function 'isop.test' for testing the ISOP model

ADDED * included (non-iterative) eigenvector method for estimating

the partial credit model -> 'rasch.evm.pcm'

NOTE * included argument 'ref.item' in rasch.mirtlc for specification

of reference items

ADDED * included test of de Gooijer and Yuan (2011) that CSN is non-positive

-> 'unidim.test.csn'

ADDED * included option for testing differential item functioning in

rasch.evm.pcm

NOTE * changed convergence behavior in rasch.mirtlc for 2PL models

ADDED * robust linking alternative to mean-mean linking ('linking.robust

NOTE * corrected output for hierarchical rater model ('rm.hrm

ADDED * included simple latent class model for two exchangeable raters

('lc.2raters')

ADDED * extended unidimensional copula model to multiple dimensions ('rasch.copula3

NOTE * changed numerical differentiation parameters in several functions

to a smaller value

ADDED * included missing data IRT model ('rasch.mml2', irtmodel='missing1

NOTE * included person (containing person parameters) as a value in rasch.copula2

and rasch.copula2

FIXED * fixed a bug in 'testlet.yen.q3

NOTE * allowed correlated residuals in reliability calculation of

'reliability.nonlinearSEM'

NOTE * included reliability estimation for pseudo maximum likelihood

estimation ('rasch.pml3')

NOTE * included marginal item parameters in the output in testlet model

('mcmc.3pno.testlet')

DATA * included/modified datasets: data.reck73C1a, data.reck73C1b

data.reck75C2, data.reck78ExA, data.reck79ExB, data.liking.science, data.si02, data.si03, data.si04, data.si05

EXAMP * included/modified examples: isop.test (1), rasch.evm.pcm (1,2,3,4,5,6

data.reck (2,3), rasch.mirtlc (3,4,5), gom.em (2), unidim.test.csn (1,2), gom.em (1), linking.robust (1,2,3), lc.2raters (1), data.wide2long (2), rasch.copula (4), rasch.mml2 (7), reliability.nonlinearSEM (1)

sirt 0.42

NOTE * included further values in smirt to allow to apply itemfit.sx2

in the CDM package

FIXED * fixed a bug in output of person parameters in smirt (missing

standard errors; thanks to Balal Izanloo)

NOTE * included empirical item-attribute discriminations in lsdm

NOTE * changed NAMESPACE and DESCRIPTION files due to a change in Rcpp

FIXED * fixed a bug for constraint in mu for multidimensional models

in rasch.mml2

FIXED * fixed warning messages when reading NOHARM output files

NOTE * stabilized estimation of tetrachoric correlation coefficients

for Tucker method (addition of cell sizes with a value .5)

ADDED * included the method of Bonett and Price for calculation a

tetrachoric correlation

NOTE * included additional outputs and item parameters for the

HRM-SDT (thanks to a discussion with Robin Gleeson)

NOTE * extended modelfit.sirt to objects of class R2noharm

DATA * included/modified datasets: data.timss07.G8.RUS, data.reck611

EXAMP * included/modified examples: fuzcluster (1), modelfit.sirt (1

sirt 0.41

ADDED * included maximum likelihood estimation for discrete data in the

belief function framework ('fuzdiscr')

ADDED * included pseudo-log-likelihood estimation for fractional item

responses (values between 0 and 1) in 'rasch.mml2'

ADDED * included clustering fur fuzzy continuous data (belief function

framework) ('fuzcluster')

DATA * included datasets: data.pirlsmissing

EXAMP * included examples: mcmc.2pno.ml (3), rasch.mml2 (7

sirt 0.40

FIXED * fixed a bug in 'data.wide2long

NOTE * changed Rcpp code in eigenvalue calculation due to a CRAN request

DATA * included datasets: data.big5.qgraph

EXAMP * included examples:

sirt 0.39

NOTE * included approximating function of expected percent score in

truescore.irt

NOTE * added a check function for inits in smirt (thanks to Balal Izanloo

FIXED * fixed a bug in output of person parameters (thanks to Balal Izanloo

NOTE * speeded latent regression model 'latent.em.regression.raschtype

ADDED * included latent.em.regression.normal for normally distributed

outcomes

NOTE * included factor for convergence acceleration in invariance.alignment

NOTE * included summary for latent regression models

ADDED * included function 'mle.pcm.group' for maximum likelihood estimation

in generalized item response models which includes an option for estimating group parameters

NOTE * changed algorithm in 'invariance.alignment' into a two-step approach

NOTE * included plot method for function 'invariance.alignment

DATA * included datasets: data.inv4gr, data.ess2005, data.mcdonald.rape

data.si01

EXAMP * included examples: lsdm (4,5), invariance.alignment (3

plausible.value.imputation.raschtype (2,3)

sirt 0.38

ADDED * included function for automated finding of a scoring key in

a data frame with raw item responses ('automatic.recode')

FIXED * fixed a bug in linking.haberman function

NOTE * added argument personpars in linking.haberman for transformation

of person parameters

ADDED * included alignment method for approximate invariance

(Asparouhov & Muthen, 2013)

ADDED * included function truescore.irt for conversion of trait scores

into true scores for unidimensional item response models

DATA * included item parameters data.activity.itempars

sirt 0.37

FIXED * fixed a bug in rasch.mirtlc with multiple starts in latent

class models

NOTE * allowed input of student weights and product-moment

matrix in R2noharm

FIXED * fixed a bug in calculation of degrees of freedom in R2noharm

function

FIXED * fixed a bug in linear transformation for person parameters

in linking.haberman

ADDED * included eigenvalue decomposition function 'eigenvalues.sirt

DATA * included datasets: 'data.noharmExC', 'data.mcdonald', 'data.reck

DATA * included data conversion function 'data.wide2long'

DATA * renamed 'data.noharm' into 'data.noharm18'

sirt 0.35

NOTE * corrected legends and labels in plot.isop function

ADDED * included function rowKSmallest2.sirt

FIXED * fixed a bug in mcmc.3pno.testlet (thanks to Chun-Hsien Wu

-> removed parametrization 3 (bifactor model) because it produced untrustworthy results

NOTE * included gregmisc in imports (thanks to Jean-Paul Fox

NOTE * disabled parametrization 2 in mcmc.3pno.testlet

-> now only the original model from the Glas paper (parametrization 1) is estimated

NOTE * included argument for item parameter fixings in

pairwise conditional likelihood function rasch.pairwise.itemcluster

NOTE * included ETS classification labels of uniform DIF in

function dif.logistic.regression

NOTE * included the option of not submitting any item strata

to stratified.cronbach.alpha and an example for using the psych package

ADDED * included function 'md.pattern.sirt' for analyzing

response patterns

NOTE * included crossprod function in several sirt functions

ADDED * included monotone nonparametric estimation in 'rasch.mml2

as the default in case of irtmodel='npirt' and npformula=NULL

NOTE * speeded irtmodel='npirt' in case of providing npformula

NOTE * included output of summary of testlet effects in

mcmc.3pno.testlet

ADDED * included the functional unidimensional model (Ip et al. 2013

ADDED * included the linking method of Haberman (2009

NOTE * included plot method for rasch.mml2 function

NOTE * removed rasch.testlet.glmer function

sirt 0.34

ADDED * included estimation of ISOP and ADISOP models

FIXED * fixed a bug in pbivnorm2 for negative correlations

NOTE * included argument increment.factor in smirt to

prevent nonconvergence (thanks to Balal Izanloo)

ADDED * included rowwise maximum and minimum and rowwise

cumulative sum of a matrix based on Rcpp code

ADDED * included matrix functions rowIntervalIndex.sirt

(useful for simulations) and rowKSmallest.sirt (useful for sorting matrix entries, e.g. for predictive mean matching in mice)

FIXED * fixed a bug in mcmc.2pno.ml (thanks to Ronny Scherer

ADDED * included matrix row and column wise monotone regression

function monoreg.rowwise (adapted from fdrtool package)

ADDED * included graded response model estimation in isop.poly

function

ADDED * included plot method for ISOP models (isop.dich and

isop.poly)

DATA * included example data.big5

EXAMP * included an example for DETECT for polytomous data

sirt 0.32

ADDED * included the estimation of the 2PL model via MCMC (mcmc.2pno

NOTE * included a function for estimating Rhat and MAP from MCMC output

(mcmc.list.descriptives)

ADDED * included a function for writing coda files (mcmclist2coda

NOTE * renamed jacknife.rasch.jml into rasch.jml.jackknife1

ADDED * included mcmc.2pnoh for estimating a hierarchical IRT model

ADDED * included mcmc.3pno.testlet for estimating IRT testlet and

bifactor models for dichotomous data

ADDED * included mcmc.2pno.ml function for estimating a multilevel

IRT model for dichotomous and normally distributed data

ADDED * included R2NOHARM functions into this package for running

NOHARM from within R

NOTE * modelfit.sirt now allows objects of class smirt

NOTE * speeded calculation of modelfit.sirt

NOTE * speeded rasch.mml2, prob.guttman, rasch.mirtlc, rm.facets, rm.hrm

sirt 0.31

NOTE * speeded rasch.pml2 a bit

FIXED * fixed a bug in smirt function (thanks to Izanloo Balal

ADDED * included function tetrachoric2 faster calculation

of the tetrachoric correlation matrix

ADDED * included pbivnorm2 for calculating the bivariate normal integral

NOTE * included rasch.pml3, a bit faster version than rasch.pml2

FIXED * eliminated warning statements in smirt and fixed a bug in

estimation of a and b parameters in smirt (thanks to Izanloo Balal)

sirt 0.30

NOTE * included a Rcpp function for faster calculations in rm.hrm

(now there is a dependency of Rcpp and RcppArmadillo)

ADDED * included smirt function for estimating the multdimensional

noncompensatory and compensatory models

ADDED * included variational approximation for the Rasch model

ADDED * included the (Rasch) grade of membership model

sirt 0.29

ADDED * included function for computing eigenvalues and inverses of

many matrices

ADDED * included facets models with item/rater intercepts and slopes

ADDED * included initial version of the hierarchical rater model based on

signal detection theory (DeCarlo et al., 2011)

ADDED * included function for simulating and estimating the

Dirichlet distribution

ADDED * included grade of membership model with joint maximum

likelihood estimation -> gom.jml

sirt 0.28

NOTE * included standard errors in rasch.mml2

ADDED * included marginal true score reliability for binary item

response data (Dimitrov, 2003; thanks to Ulrich Schroeders)

sirt 0.27

ADDED * included classification accuracy in the Rasch model

ADDED * implemented the multidimensional latent class Rasch model

(Bartolucci, 2007)

NOTE * cleaning of help files, included several datasets and

examples

NOTE * included log-linear smoothing of the theta distribution

in rasch.mirtlc

ADDED * included 2PL estimation in rasch.mirtlc

ADDED * included global fit statistics in modelfit.sirt

NOTE * included log-linear smoothing of the ability distribution

in rasch.mml2

NOTE * accelerated rasch.pml function and renamed it into rasch.pml2

NOTE * allowed for linear constraints for residual correlations

in rasch.pml2

NOTE * accelerated latent.regression.em.raschtype and

plausible value routines

sirt 0.26

NOTE * restructured rasch.mml2 function to get a bit more compact code

NOTE * do not export rasch.mml and rasch.copula anymore via namespace

ADDED * included nonparametric IRT function estimation in rasch.mml2

-> argument irtmodel='npirt' (Rossi, Wang & Ramsay, 2002)

ADDED * included multidimensional models in rasch.mml2

NOTE * added corrected AIC (AICc) in rasch.mml2 and rasch.copula2

NOTE * corrected mean and SD estimation in rasch.mml2

FIXED * fixed a bug in the calculation of the number of estimated parameters

in rasch.copula2

FIXED * corrected rasch.mml2 function in case of fixed weights of

trait distribution

FIXED * corrected a bug in wle.rasch

ADDED * included probabilistic Guttman model

ADDED * added analytical bias correction method for JML estimation of the Rasch model

NOTE * accelerated PMML estimation algorithm

ADDED * added 2PL estimation in rasch.pml

sirt 0.25

FIXED * fixed bad numerical behavior in rasch.copula2 for Cook-Johnson

and Frank copula models

NOTE * improved speed in yen.q3 and extended output

NOTE * speed improvement in rasch.mml and rasch.copula2

NOTE * included version rasch.mml2 with substantial speed improvements

NOTE * speed improvements for rasch.jml function

sirt 0.24

NOTE * changed algorithms behavior of rasch.copula2

(parameter increments depend on number of iterations)