Version: 1.99993
Category: FEATURES
Text: ---
Version: 1.99993
Category: BUG FIXES
Text: changed handling of item names in 'tam.mml.mfr' back to TAM
1.995-0 version (problem communicated by Barth Riley)
Version: 1.99993
Category: BUG FIXES
Text: fixed a bug in 'tam.mml.2pl' for irtmodel='GPCM.design' with
provided design matrices for item slopes (thanks to Matthias
Trendtel)
Version: 1.99993
Category: NOTES
Text: ---
Version: 1.99993
Category: DATASETS INCLUDED OR MODIFIED
Text: ---
Version: 1.99993
Category: EXAMPLES INCLUDED OR MODIFIED
Text: ---
Version: 1.99992
Category: FEATURES
Text: ---
Version: 1.99992
Category: BUG FIXES
Text: fixed incorrect handling of item renaming in 'tam.mml.mfr'
(thanks to Barth Riley)
Version: 1.99992
Category: BUG FIXES
Text: fixed a bug in calculation of p values in 'tam.fit' (thanks to
David Torres Irribarra)
Version: 1.99992
Category: BUG FIXES
Text: fixed a bug in 'IRT.simulate' with used argument 'nobs' (thanks
to Mark Dulhunty)
Version: 1.99992
Category: BUG FIXES
Text: the fixing of the random seed within the 'tam.fit' function is
removed (thanks to Sebastian Weirich)
Version: 1.99992
Category: BUG FIXES
Text: fixed crucial bug in 3PL estimation in 'tam.mml.3pl' function
(thanks to Petra Kleiber)
Version: 1.99992
Category: NOTES
Text: stop estimation in 'tam.jml' (and 'tam.jml2') if there are
persons with only missing item responses (communicated by
Ricardo Primi)
Version: 1.99992
Category: NOTES
Text: included standard errors for constrained parameters in
'tam.mml.mfr' similar to the software ConQuest software
(requested by Florian Keller und Domenico Angelone)
Version: 1.99992
Category: DATASETS INCLUDED OR MODIFIED
Text: ---
Version: 1.99992
Category: EXAMPLES INCLUDED OR MODIFIED
Text: ---
Version: 1.995
Category: FEATURES
Text: ---
Version: 1.995
Category: BUG FIXES
Text: fixed a bug in 'tam.fit' when proving a fit matrix F with missing
labels (thanks to Maxim Morin)
Version: 1.995
Category: NOTES
Text: included argument 'version' in 'msq.itemfit'. Another Rcpp
implementation (version=2) of the fit calculation has been
added which avoids the storage of memory intensive objects
(previous function; version=1). Additionally, a pure R function
of calculating fit can be requested using version=3 (thanks to
Frank Musekamp).
Version: 1.995
Category: DATASETS INCLUDED OR MODIFIED
Text: ---
Version: 1.995
Category: EXAMPLES INCLUDED OR MODIFIED
Text: ---
Version: 1.99
Category: FEATURES
Text: ---
Version: 1.99
Category: BUG FIXES
Text: fixed a bug in 'tam.wle' which occured if some persons were
eliminated from the analysis
Version: 1.99
Category: BUG FIXES
Text: fixed a recently induced bug in 'tam.wle' estimation of
multidimensional models (thanks to Sascha Bernholt)
Version: 1.99
Category: NOTES
Text: ---
Version: 1.99
Category: DATASETS INCLUDED OR MODIFIED
Text: ---
Version: 1.99
Category: EXAMPLES INCLUDED OR MODIFIED
Text: ---
Version: 1.17
Category: FEATURES
Text: included function 'IRTLikelihood.ctt' which computes the
individual likelihood under classical test theory and normally
distributed measurement errors
Version: 1.17
Category: BUG FIXES
Text: fixed a bug in plausible value imputation 'tam.pv' in case of
'normal.approx=FALSE' (thanks to Matthias Trendtel)
Version: 1.17
Category: BUG FIXES
Text: fixed a bug in plotting 'png' files in 'plot.tam' (thanks to
Rainer Alexandrowicz)
Version: 1.17
Category: BUG FIXES
Text: fixed a bug in calculating standard errors with only one
estimated xsi parameter
Version: 1.17
Category: BUG FIXES
Text: fixed a crash in 'tam.jml2'
Version: 1.17
Category: BUG FIXES
Text: fixed a bug in 'tam.wle' when using the argument 'score.resp'
Version: 1.17
Category: NOTES
Text: included Example 24 for specifying sum constraints in partial
credit models (requested by Chen-Wei Liu)
Version: 1.17
Category: NOTES
Text: output of 'tam.wle' is now an object of class 'tam.wle'. A print
method for this class is defined.
Version: 1.17
Category: NOTES
Text: WLE reliability in 'tam.wle' is now calculated by taken sample
weights 'pweights' into account
Version: 1.17
Category: NOTES
Text: included Example 11 of 'tam.mml.3pl' with mixed item response
format (thanks to a correspondence with Andreas Seifert)
Version: 1.17
Category: NOTES
Text: included utility functions for weighted statistics
'weighted_Stats'
Version: 1.17
Category: NOTES
Text: included utility functions 'WLErel' and 'EAPrel' for computation
of WLE/EAP reliability
Version: 1.17
Category: NOTES
Text: added 'print' methods for tam classes ('tam.mml', 'tamaan', ...)
Version: 1.17
Category: NOTES
Text: added S3 methods 'Scale' and 'DescribeBy'. The application of
these methods to object classes will be included in future TAM
versions.
Version: 1.17
Category: NOTES
Text: slight change in summary output of 'IRT.modelfit'
Version: 1.17
Category: DATASETS INCLUDED OR MODIFIED
Text: ---
Version: 1.17
Category: EXAMPLES INCLUDED OR MODIFIED
Text: tam.mml (24), WLErel (1), tam.mml.3pl (11), weighted_Stats
(1,2,3), IRTLikelihood.ctt (1), tam.pv (2)
Version: 1.16
Category: Features
Text: ---
Version: 1.16
Category: Bug fixes
Text: fixed a crucial bug in estimation of 'tam.mml.2pl',
irtmodel='GPCM.design'
Version: 1.16
Category: Notes
Text: included a warning message in 'IRT.truescore' when not all values
in the theta grid can be computed
Version: 1.16
Category: Notes
Text: cleaned namespace file and defined imported functions in a more
explicit way
Version: 1.16
Category: Notes
Text: included argument 'Q' in 'IRT.truescore' function which allows
for computation of weighted true scores (thanks to David
Sichau)
Version: 1.16
Category: Notes
Text: fixed a bug in 'tam.mml.2pl' with irtmodel='GPCM.design' in case
of blank categories
Version: 1.16
Category: Datasets included or modified
Text: ---
Version: 1.16
Category: Examples included or modified
Text: IRT.truescore (2)
Version: 1.15
Category: Features
Text: ---
Version: 1.15
Category: Bug fixes
Text: fixed a bug in postprocessing of parameter names in 'tam.mml.mfr'
with the option "constraint='items'"
Version: 1.15
Category: Bug fixes
Text: avoided NA entries in posterior calculation in 'tam.mml' and
'tam.mml.2pl'
Version: 1.15
Category: Notes
Text: corrected output of likelihood when minimum value was not
obtained in last iteration
Version: 1.15
Category: Notes
Text: changed behavior of parameters 'max.increment' and
'increment.factor' in 'tam.mml.mfr' which should result in more
stable deviance behavior
Version: 1.15
Category: Notes
Text: included attributes 'pid' and 'pweights' in 'IRT.likelihood' and
'IRT.posterior'
Version: 1.15
Category: Notes
Text: included optional argument 'gamma.init' for 'tam.mml.2pl' and
irtmodel='GPCM.design'
Version: 1.15
Category: Notes
Text: included argument 'item.elim' in 'tam.mml', 'tam.mml.2pl' and
'tam.mml.3pl' which prevents the omission of items with a
maximum score of zero (suggested by Anja Mikolajetz)
Version: 1.15
Category: Notes
Text: changed output of 'pweights' to original provided person weights,
not the transformed person weights
Version: 1.15
Category: Datasets included or modified
Text: ---
Version: 1.15
Category: Examples included or modified
Text: ---
Version: 1.14
Category: Features
Text: ---
Version: 1.14
Category: Bug fixes
Text: fixed a bug in creating design matrices with more than 9 levels
of a factor in a facet for facet models with items with varying
number of categories
Version: 1.14
Category: Bug fixes
Text: fixed a recently introduced bug in 'tam.pv' which occured due to
a change in the list of arguments in auxiliary function
'stud_prior.v2' (thanks to Florian Gigl)
Version: 1.14
Category: Notes
Text: ---
Version: 1.14
Category: Datasets included or modified
Text: ---
Version: 1.14
Category: Examples included or modified
Text: ---
Version: 1.13
Category: Features
Text: ---
Version: 1.13
Category: Bug fixes
Text: fixed a recently introduced bug in TAM 1.12-0 when creating the
item parameter table
Version: 1.13
Category: Notes
Text: extended value 'item' to output of category 0 if design matrices
put values on zero categories
Version: 1.13
Category: Datasets included or modified
Text: ---
Version: 1.13
Category: Examples included or modified
Text: tam.mml (23)
Version: 1.12
Category: Features
Text: ---
Version: 1.12
Category: Bug fixes
Text: fixed a recently included bug (in TAM 1.11-0) in 'tam.mml.3pl'
estimation when guessing parameters are estimated (thanks to
Rolf Strietholt and Laura Zieger)
Version: 1.12
Category: Notes
Text: ---
Version: 1.12
Category: Datasets included or modified
Text: ---
Version: 1.12
Category: Examples included or modified
Text: ---
Version: 1.11
Category: Features
Text: ---
Version: 1.11
Category: Bug fixes
Text: fixed a recently included bug in TAM 1.10-0 in calculation of
deviance in 'tam.mml.2pl', 'tam.mml.3pl' and 'tam.mml.3pl'
(thanks to Christopher Gess)
Version: 1.11
Category: Bug fixes
Text: fixed a recently included bug in TAM 1.9-0 in estimation of
models with estimated means of latent trait (thanks to Frank
Musekamp)
Version: 1.11
Category: Notes
Text: included guessing parameters and its standard errors in output of
'tam.mml.3pl' ('guess' and 'se.guess')
Version: 1.11
Category: Datasets included or modified
Text: ---
Version: 1.11
Category: Examples included or modified
Text: ---
Version: 1.10
Category: Features
Text: added simulation function 'IRT.simulate'
Version: 1.10
Category: Features
Text: added function 'IRT.truescore' which converts theta scores into
true scores
Version: 1.10
Category: Bug fixes
Text: fixed a bug in calculation of expected counts
Version: 1.10
Category: Notes
Text: included argument 'dev_crit' in 'control' in tam functions which
allows a decision whether change in absolute deviance
difference (dev_crit="absolute") or in relative deviance
differences (dev_crit="relative") should be assessed.
Version: 1.10
Category: Notes
Text: extended 'IRT.itemfit' S3 method to objects of classes generated
in TAM (suggested by Karoline Sachse)
Version: 1.10
Category: Notes
Text: included item-wise calculation of thresholds according to Ali,
Chang and Anderson (2015) suggestion in 'IRT.threshold'
Version: 1.10
Category: Datasets included or modified
Text: ---
Version: 1.10
Category: Examples included or modified
Text: IRT.itemfit.tam (1,2), IRT.threshold (3), IRT.simulate (1,2,3,4),
IRT.truescore (1)
Version: 1.9
Category: Features
Text: included accelerators of the EM algorithm according to Ramsay
(1975) and Yu (2012). In the recent TAM package version, no
acceleration is used as an default.
Version: 1.9
Category: Bug fixes
Text: Fixed recently broken 'tam.mml.3pl' function when the design
matrix E is used.
Version: 1.9
Category: Notes
Text: small speedup for large samples of students in unidimensional
models
Version: 1.9
Category: Datasets included or modified
Text: ---
Version: 1.9
Category: Examples included or modified
Text: tam.mml (21,22)
Version: 1.8
Category: Features
Text: added S3 method 'IRT.informationCurves' for computing item and
test information curves (suggested by Ray Opao)
Version: 1.8
Category: Bug fixes
Text: fixed a crucial bug in 'tam.mml.3pl' for mixed dichotomous and
polytomous data occur and guessing parameters are estimated
(thanks to Matthias Trendtel)
Version: 1.8
Category: Notes
Text: added the argument 'Q.fixed' in 'tam.mml.3pl' for usage of fixed
item loadings
Version: 1.8
Category: Notes
Text: small speedup in M-step for datasets with large number of items
Version: 1.8
Category: Datasets included or modified
Text: ---
Version: 1.8
Category: Examples included or modified
Text: tam.mml (15c), tam.mml.3pl (10), IRT.informationCurves (1,2)
Version: 1.7
Category: Features
Text: included S3 method 'IRT.residuals' (and 'residuals') for objects
of classes 'tam.mml', 'tam.mml.2pl' and 'tam.mml.mfr'
Version: 1.7
Category: Features
Text: added function 'msq.itemfitWLE' (see ?msq.itemfit) which computes
outfit and infit statistics based on weighted likelihood
estimates (WLEs)
Version: 1.7
Category: Features
Text: added function 'tam.Q3' for calculation of Q3 statistics based on
WLEs
Version: 1.7
Category: Bug fixes
Text: fixed a bug in 'tam.mml.3pl' (which led to an error) in case of
multiple groups
Version: 1.7
Category: Bug fixes
Text: fixed a bug in 'tam.mml.mfr' when no person identifiers were
provided (thanks to by Michal Modzelewski)
Version: 1.7
Category: Bug fixes
Text: fixed a bug in 'msq.itemfit' with differing number of categories
per item
Version: 1.7
Category: Bug fixes
Text: fixed a bug in calculation of expected counts for multifaceted
models
Version: 1.7
Category: Bug fixes
Text: fixed a bug in 'tam.mml.mfr' with non-unique combinations of
person and facet identifiers
Version: 1.7
Category: Notes
Text: speeded 'tam.mml.3pl' for models with many item parameters
Version: 1.7
Category: Notes
Text: added argument 'change' in 'plotDevianceTAM' for plotting
iteration progress in deviance values
Version: 1.7
Category: Notes
Text: added arguments 'progress' and 'output.prob' in 'tam.wle'
Version: 1.7
Category: Notes
Text: added summary of fit statistics in output of 'msq.itemfit' and
'summary.msq.itemfit'
Version: 1.7
Category: Notes
Text: included sample size of each item pair in 'tam.modelfit' output
value 'stat.itempair'
Version: 1.7
Category: Notes
Text: renamed datset 'sim.rasch' into 'data.sim.rasch'. The same
procedure was conducted for all other 'sim.xxx' datasets.
Version: 1.7
Category: Datasets included or modified
Text: ---
Version: 1.7
Category: Examples included or modified
Text: IRT.residuals (1), msq.itemfit (1,2,3), tam.modelfit (4)
Version: 1.6
Category: Features
Text: included function 'IRT.drawPV' for drawing plausible values based
on individual posterior (output of 'IRT.posterior')
Version: 1.6
Category: Bug fixes
Text: fixed a bug for input of a B loading matrix with no item labels
Version: 1.6
Category: Bug fixes
Text: fixed a bug in 'plot.tam' with missing data in item responses
(bug fix provided by Michal Modzelewski)
Version: 1.6
Category: Bug fixes
Text: corrected an included bug in recent TAM versions in AIC
calculation (thanks to Simon Grund)
Version: 1.6
Category: Bug fixes
Text: fixed a bug in variance fixing in 'tam.fa' which occured in a
recent TAM version due to changes in defaults in 'tam.mml.2pl'
Version: 1.6
Category: Bug fixes
Text: fixed a bug when constraining of item parameters was ignored in
'tamaan' (thanks to Stefan Behrendt)
Version: 1.6
Category: Notes
Text: speeded data/design matrix preparation phase in 'tam.mml.mfr'
Version: 1.6
Category: Notes
Text: included internal function 'tamcat' for analyzing computation
time
Version: 1.6
Category: Notes
Text: changed numerical behavior in 'tam.mml.mfr' in order to avoid a
zero sum of all individual posterior probabilities (thanks to
Roman Freunberger)
Version: 1.6
Category: Notes
Text: included argument 'xsi.setnull' in 'tam.mml.mfr' for convenient
fixing of xsi parameter groups. A warning is now given if the
combination of person and facet identifiers is not unique.
Version: 1.6
Category: Notes
Text: allowed also explicit use of facets without effects in
'tam.mml.mfr' on 'formulaA', e.g. 'item*step + 0*rater' sets
all rater effects to zero
Version: 1.6
Category: Notes
Text: included warning in 'tam.wle' if the WLE is (possibly) not
estimable (suggested by Rainer Alexandrowicz)
Version: 1.6
Category: Datasets included or modified
Text: ---
Version: 1.6
Category: Examples included or modified
Text: tam.mml (19, 20, 10a), IRT.drawPV (1), tamaan (1.9)
Version: 1.5
Category: Features
Text: included S3 methods 'IRT.expectedCounts', 'IRT.modelfit',
'predict' and 'IRT.data' for fitted models in TAM
Version: 1.5
Category: Features
Text: included item fit statistic on item level 'msq.itemfit' as an
alternative to the simulation based 'tam.fit' function
Version: 1.5
Category: Features
Text: included linear approximation for confirmatory factor analysis
'IRT.linearCFA'
Version: 1.5
Category: Bug fixes
Text: fixed a bug in plausible value imputation in multidimensional
models and normal approximation (reported by Dan Su)
Version: 1.5
Category: Bug fixes
Text: changed resp in output of 'tam.mml', 'tam.mml.2pl' and
'tam.mml.3pl' to output the original used data with missings
(thanks to Matthias Trendtel)
Version: 1.5
Category: Bug fixes
Text: extended tam.modelfit to handle multi matrix design appropriately
Version: 1.5
Category: Bug fixes
Text: changed defaults in 'est.variance' if 'variance.fixed' is
provided in 'tam.mml.2pl'. The previous default led to bugs in
the tamaan function. (reported by Christoph Duchhardt)
Version: 1.5
Category: Notes
Text: added output values 'xsi.fixed.estimated', 'B.fixed.estimated'
for default item parameter fixings in tam.mml, tam.mml.2pl,
tam.mml.mfr and tam.mml.3pl (suggested by Matthias Trendtel)
Version: 1.5
Category: Notes
Text: extended tan.modelfit function for more flexible input to allow
for assessing model fit for objects which were not fitted in
TAM ('tam.modelfit.IRT', 'tam.modelfit.args')
Version: 1.5
Category: Notes
Text: added 'IRT.likelihood' and 'IRT.posterior' S3 method for object
of class 'tam.latreg'
Version: 1.5
Category: Notes
Text: extended 'plotctt' and 'plot.tam' the using graphics package in
addition to lattice (suggested by Michal Modzelewski)
Version: 1.5
Category: Notes
Text: included function for computing Thurstonian thresholds
('IRT.threshold')
Version: 1.5
Category: Datasets included or modified
Text: ---
Version: 1.5
Category: Examples included or modified
Text: tam.mml (1,5t,6), IRT.expectedCounts.tam (1), tam.modelfit (1),
predict (1), msq.itemfit (1), IRT.linearCFA (1,2),
IRT.threshold (1,2)
Version: 1.4
Category: Features
Text: included function 'cfa.extract.itempars' for extracting item
parameters from a fitted confirmatory factor analysis with the
cfa function in lavaan package
Version: 1.4
Category: Features
Text: included the function 'IRTLikelihood.cfa' for extracting the
individual likelihood from fitted confirmatory factor analyses
Version: 1.4
Category: Features
Text: included an S3 method 'IRT.WrightMap' which is a wrapper to the
WrightMap package
Version: 1.4
Category: Bug fixes
Text: fixed a bug for item response dataset with only one column
Version: 1.4
Category: Bug fixes
Text: fixed a bug in tamaan function when applied to TYPE="TRAIT" and
models without guessing parameters
Version: 1.4
Category: Bug fixes
Text: fixed a bug in plot.ctt function for input of item response data
with only one columns (thanks to Michal Modzelewski)
Version: 1.4
Category: Notes
Text: added item types 'PCM(kk)' and 'GPCM(kk)' for smoothing item
intercepts in tamaan() function
Version: 1.4
Category: Notes
Text: included a summary method for 'tam.fit'
Version: 1.4
Category: Notes
Text: included 'MEASERR' convenience method for single indicators with
measurement errors in 'lavaanify.IRT'
Version: 1.4
Category: Notes
Text: changed some internal handling in 'lavaanify.IRT' due to
announced changes in lavaan 0.5-18 in 'lavaanify'
Version: 1.4
Category: Notes
Text: changed equality constraints in the section "MODEL CONSTRAINT" in
'tamaanify' to the usage of "==" instead of "=" (as in lavaan)
Version: 1.4
Category: Datasets included or modified
Text: data.ctest2
Version: 1.4
Category: Examples included or modified
Text: cfa.extract.itempars (1), IRTLikelihood.cfa (1), tamaan (2),
tam.fit (1,2), data.geiser (2), tam.latreg (2,3), IRT.WrightMap
(1,2,3,4), data.cqc (1,2,3), lavaanify.IRT (6)
Version: 1.3
Date: 2015-01-06
Category: Features
Text: included option for sum constraints on item intercepts
(constraint="items") in 'tam.mml'. For polytomous data, this
option automatically specifies irtmodel="PCM2".
Version: 1.3
Date: 2015-01-06
Category: Features
Text: included truncated normal prior distributions for gammaslope
parameters in 'tam.mml.3pl'
Version: 1.3
Date: 2015-01-06
Category: Features
Text: included 'tamaan' and 'tamaanify' functions for more more
convenient model specifications in TAM
Version: 1.3
Date: 2015-01-06
Category: Features
Text: included 'doparse' function as a shortcut for writing loops in
model syntax
Version: 1.3
Date: 2015-01-06
Category: Features
Text: included item-category specific curves in 'plot.tam' using the
argument type="items" (suggested by Cheng-Hsuan Li and Michal
Modzelewski)
Version: 1.3
Date: 2015-01-06
Category: Features
Text: plot function for type="items" now also works for
multidimensional item response models with between item
dimensionality
Version: 1.3
Date: 2015-01-06
Category: Features
Text: included normal approximation and sampling of regression
coefficients for plausible value imputation ('tam.pv') for
multidimensional item response models. The theta grid can also
be fixed (argument theta.model=TRUE) and is taken from the
fitted model.
Version: 1.3
Date: 2015-01-06
Category: Features
Text: included the function 'tampv2datalist' for converting plausible
values and a set of covariates into a list of multiply imputed
datasets
Version: 1.3
Date: 2015-01-06
Category: Features
Text: included the function 'tam.latreg' which performs a latent
regression model in which only the individual likelihood is
needed as an input
Version: 1.3
Date: 2015-01-06
Category: Bug fixes
Text: corrected algorithmic stopping criteria in 'tam.mml.3pl'
Version: 1.3
Date: 2015-01-06
Category: Bug fixes
Text: fixed a bug in 'tam.mml.2pl' when design matrix B.fixed for fixed
loadings contains only one row
Version: 1.3
Date: 2015-01-06
Category: Bug fixes
Text: another bug was fixed by Michal Modzelewski in data preparation
in the multi-facet function 'tam.mml.mfr'
Version: 1.3
Date: 2015-01-06
Category: Bug fixes
Text: fixed a bug in estimation routines if a dataset resp is provided
without column names (thanks to Alec Nyce)
Version: 1.3
Date: 2015-01-06
Category: Notes
Text: included parametrization of mean item intercept (irtmodel="PCM2")
in output of tam.mml and tam.mml.2pl (value item$xsi.item)
Version: 1.3
Date: 2015-01-06
Category: Notes
Text: included nonlinear terms in lavaan syntax in 'lavaanify.IRT'
Version: 1.3
Date: 2015-01-06
Category: Notes
Text: included option for initial delta parameters in 'tam.mml.3pl'
Version: 1.3
Date: 2015-01-06
Category: Notes
Text: added AIC3 information criterion in summary
Version: 1.3
Date: 2015-01-06
Category: Notes
Text: included datasets data.geiser and data.janssen for latent class
analysis and mixture Rasch analysis (thanks to Christian Geiser
and Anne Janssen)
Version: 1.3
Date: 2015-01-06
Category: Notes
Text: included Example 3 in 'tam.wle' comparing WLE person parameter
estimates from the TAM and the PP package
Version: 1.3
Date: 2015-01-06
Category: Notes
Text: included Example 3 in 'tam.threshold' for creating Wright maps
with the WrightMap package
Version: 1.3
Date: 2015-01-06
Category: Datasets included or modified
Text: data.geiser, data.janssen, data.janssen2
Version: 1.3
Date: 2015-01-06
Category: Examples included or modified
Text: tam.modelfit (3), tam.mml (1,4,5,6,13,18), lavaanify.IRT (3,4),
tam.mml.3pl (1.6b,4,7,8,9), tamaanify (1,2), tamaan (1,2),
plot.tam (1,2), tam.wle (3), tam.threshold (3), tam.pv (2,3),
tam.latreg (1)
Version: 1.2
Date: 2014-11-22
Category: Features
Text: included fit of constrained facet parameters for output of
'tam.mml.mfr'
Version: 1.2
Date: 2014-11-22
Category: Features
Text: included extended lavaan syntax 'lavaanify.IRT'. This function
was previously included in sirt package as 'lavaanify.sirt'.
Version: 1.2
Date: 2014-11-22
Category: Features
Text: added argument 'gammaslope.center' in 'tam.mml.3pl' for centering
item parameters within iterations in estimation
Version: 1.2
Date: 2014-11-22
Category: Features
Text: included an argument of fixing person parameters in 'tam.jml'
(see tam.jml, Example 1)
Version: 1.2
Date: 2014-11-22
Category: Features
Text: added S3 methods for fitted models in TAM: 'logLik',
'IRT.likelihood', 'IRT.posterior', 'IRT.irfprob',
'IRT.factor.scores'. These S3 methods were defined in the
recent version of the CDM (>= 4.0) package.
Version: 1.2
Date: 2014-11-22
Category: Bug fixes
Text: improved model identification in 'tam.mml.mfr' in case of
differing number of categories per item and fixed a bug in
creating the A matrix (thanks to Michal Modzelewski).
Version: 1.2
Date: 2014-11-22
Category: Bug fixes
Text: fixed a miscount of number of estimated parameters in multiple
group models (thanks to Michal Modzelewski).
Version: 1.2
Date: 2014-11-22
Category: Bug fixes
Text: fixed incorrect handling of irtmodel="PCM2" in 'tam.mml' for
multidimensional models (thanks to Chen-Wei Liu)
Version: 1.2
Date: 2014-11-22
Category: Bug fixes
Text: fixed a bug in 'tam.jml2' when some item parameters were fixed
with the xsi.fixed argument
Version: 1.2
Date: 2014-11-22
Category: Bug fixes
Text: fixed a bug in fit calculation for tam.jml objects (thanks to
Hillary Ferral)
Version: 1.2
Date: 2014-11-22
Category: Notes
Text: included Rcpp based version of item fit calculation to reduce
computational time
Version: 1.2
Date: 2014-11-22
Category: Notes
Text: changed calculation of tam.fit in case of missing item responses
which substantially changes fit statistics especially for
faceted models.
Version: 1.2
Date: 2014-11-22
Category: Notes
Text: changed handling of simulating abilities in 'tam.fit'
Version: 1.2
Date: 2014-11-22
Category: Notes
Text: included p values in output for fit statistics in 'tam.fit'
Version: 1.2
Date: 2014-11-22
Category: Notes
Text: included estimation of Thurstonian thresholds for
multidimensional models
Version: 1.2
Date: 2014-11-22
Category: Notes
Text: added an example of a 2PL mixture distribution IRT model with two
latent classes (tam.mml.3pl, Simulated Example 8)
Version: 1.2
Date: 2014-11-22
Category: Notes
Text: changed summary layout in 'tam.mml.3pl'
Version: 1.2
Date: 2014-11-22
Category: Notes
Text: made item parameter estimation in 'tam.jml' more computationally
efficient
Version: 1.2
Date: 2014-11-22
Category: Notes
Text: added anova method for 'tam.mml.3pl'
Version: 1.2
Date: 2014-11-22
Category: Notes
Text: added value of the individual likelihood in 'tam.mml',
'tam.mml.2pl' and 'tam.mml.3pl'
Version: 1.2
Date: 2014-11-22
Category: Datasets included or modified
Text: rating dataset data.exJ03 (provided by Matt Barney)
Version: 1.2
Date: 2014-11-22
Category: Examples included or modified
Text: tam.fit (4), tam.threshold (2), tam.mml.3pl (7,8), lavaanify.IRT
(1,2), tam.jml (1,4), IRT.likelihood.tam (1), IRT.factor.scores
(1), IRT.irfprob (1)
Version: 1.1
Date: 2014-10-19
Category: Features
Text: added user defined variance function in tam.mml and tam.mml.2pl
Version: 1.1
Date: 2014-10-19
Category: Features
Text: added user defined constraints on slope parameters in
'tam.mml.3pl'
Version: 1.1
Date: 2014-10-19
Category: Bug fixes
Text: fixed a bug in deviance computation in 'tam.mml.3pl' when
stochastic nodes are used
Version: 1.1
Date: 2014-10-19
Category: Bug fixes
Text: (hopefully) fixed computational problems in multidimensional
models with nearly singular covariance matrix (thanks to a
discussion with Johannes Hartig)
Version: 1.1
Date: 2014-10-19
Category: Notes
Text: added a plot function 'plot.ctt' accompanying the classical test
theory based statistic
Version: 1.1
Date: 2014-10-19
Category: Notes
Text: fixed a bug in creation of design matrices in faceted models with
differing categories per item (thanks to Michal Modzelewski).
Note that the treatment of faceted models is still not
compatible with other software (like ConQuest). A substantial
bug fix is planned in future TAM relaeses.
Version: 1.1
Date: 2014-10-19
Category: Datasets included or modified
Text: data.ctest1 (thanks to HGP)
Version: 1.1
Date: 2014-10-19
Category: Examples included or modified
Text: tam.fit (4), tam.mml (17), tam.ctt (1)
Version: 1.0-3.18
Category: Bug fixes
Text: modified incorrectly calculated thresholds with 'tam.threshold'
for multidimensional models (reported by Janine Buchholz and
Joerg-Henrik Heine)
Version: 1.0-3.18
Category: Notes
Text: included SRMSR fit statistic in tam.modelfit
Version: 1.0-3.18
Category: Notes
Text: included argument "Nsimul" in "tam.fit" which improves
calculation of fit statistics
Version: 1.0-3
Date: 2014-06-27
Category: Features
Text: included model fit statistics (Q3, SRMR, MADRESIDCOV):
'tam.modelfit'
Version: 1.0-3
Date: 2014-06-27
Category: Features
Text: included 'tam.mml.3pl' for 3PL estimation, general design
matrices for item slopes and options for discrete latent
variables (estimation of latent class models, located latent
class model, skew distributions, mixed IRT models, cognitive
diagnosis models, ... is now possible)
Version: 1.0-3
Date: 2014-06-27
Category: Features
Text: extended tam.pv for objects of class 'tam.mml.3pl'
Version: 1.0-3
Date: 2014-06-27
Category: Features
Text: speeded data preparation of faceted models a bit
Version: 1.0-3
Date: 2014-06-27
Category: Features
Text: tam.se now computes standard errors for estimated slope
parameters, B (for irtmodel in c("2PL", "GPCM", "2PL.groups"));
highly experimental for irtmodel="GPCM.design").
Version: 1.0-3
Date: 2014-06-27
Category: Features
Text: plot.tam now prints a message about the location of the exported
graphics.
Version: 1.0-3
Date: 2014-06-27
Category: Features
Text: plot.tam has a new argument 'items' for selecting the items to be
displayed. RD-file adjusted.
Version: 1.0-3
Date: 2014-06-27
Category: Features
Text: plot.tam has new arguments 'export.type="png"' and
"export.args=list()" for selecting the file type for the
graphics export. The supported file types are those supported
by ?dev.new. The argument 'export.args=list()' is for
specifying a list of arguments for the export device method.
Version: 1.0-3
Date: 2014-06-27
Category: Features
Text: tam.threshold has a new argument prob.lvl to set the probability
level of the thresholds.
Version: 1.0-3
Date: 2014-06-27
Category: Bug fixes
Text: fixed a bug in pid output in object 'person' for multidimensional
models (thanks to Sebastian Weirich)
Version: 1.0-3
Date: 2014-06-27
Category: Bug fixes
Text: fixed a bug in variance estimation for multiple group 2PL models
Version: 1.0-3
Date: 2014-06-27
Category: Bug fixes
Text: included 'designMatrices.mfr2' for a provisional bug fix for
multifaceted models with differing number of categories per
item (see Example 16 in tam.mml; thanks to Christoph Duchhardt)
Version: 1.0-3
Date: 2014-06-27
Category: Bug fixes
Text: fixed a bug in 'tam.mml.mfr' for differing number of categories
per item -> now a xsi vector with parameter fixings to values
of 99 is used
Version: 1.0-3
Date: 2014-06-27
Category: Bug fixes
Text: plot.tam is debugged regarding the case of missing WLEs for some
person (thanks to Florian Buchwald).
Version: 1.0-3
Date: 2014-06-27
Category: Bug fixes
Text: plot.tam now doesn't throw a warning when the 'Plots' directory
already exists.
Version: 1.0-3
Date: 2014-06-27
Category: Bug fixes
Text: fixed a bug in plot.tam for cross-platform accordance (thanks to
Uli Keller).
Version: 1.0-3
Date: 2014-06-27
Category: Bug fixes
Text: fixed a bug in tam.fit with missing item scores
Version: 1.0-3
Date: 2014-06-27
Category: Bug fixes
Text: fixed a bug in tam.jml so that ../Tutorials/6Population.htm now
runs without error.
Version: 1.0-3
Date: 2014-06-27
Category: Notes
Text: tam.fit is experimental for objects obtained from tam.mml.mfr.
Version: 1.0-3
Date: 2014-06-27
Category: Notes
Text: changed convergence behavior in tam.wle (thanks to Peter Harych)
Version: 1.0-3
Date: 2014-06-27
Category: Notes
Text: changed item sorting in output object 'item'
Version: 1.0-3
Date: 2014-06-27
Category: Notes
Text: tam.mml(/.2pl/.mfr) methods now return Q, tam.mml.2pl additionaly
returns B.fixed, basispar, E, and est.slopegroups objects.
RD-file adjusted.
Version: 1.0-3
Date: 2014-06-27
Category: Notes
Text: tam.jml(/.jml2) do not return fit statistics anymore. Item and
person fit can be obtained by a call to tam.fit (/.jml.fit).
Version: 1.0-3
Date: 2014-06-27
Category: Notes
Text: in case of multidimensional analyses, we recommend an update of
the R-package mvtnorm to version 0.9-99992 or higher.
Version: 1.0-3
Date: 2014-06-27
Category: Notes
Text: extended example 13 in tam.mml.Rd to the case of polytomous
longitudinal data (requested by and thanks to Florian Buchwald)
Version: 1.0-3
Date: 2014-06-27
Category: Notes
Text: extended example 6 in tam.mml.Rd to the specification of sum
constraints on the item parameters in a PCM model for differing
number of categories.
Version: 1.0-3
Date: 2014-06-27
Category: Notes
Text: Some minor changes in RD-files (eg., irtmodel for argument 'E' in
tam.mml.2pl is "GPCM.design", theta value in tam.jml is "MLE in
final step").
Version: 1.0-2
Date: 2014-04-02
Text: fixed a Bug in the optional specification of a B matrix in
tam.mml.mfr
Version: 1.0-2
Date: 2014-04-02
Text: new faster tam.mml.wle2; included Rcpp helper functions for
tam.mml.wle2 for fast computation; tam.mml.wle2 new reference
in tam.wle for objects of class tam.mml, rd-file adapted
Version: 1.0-2
Date: 2014-04-02
Text: tam.mml.mfr now accepts polytomous data with more than ten
categories per item
Version: 1.0-2
Date: 2014-04-02
Text: specification of response matrix in 'long format' fixed, see
example section (thanks to Takuya Yanagida)
Version: 1.0-2
Date: 2014-04-02
Text: some minor changes in usability (eg., pid can be specified as
vector, one-column matrix or data.frame)
Version: 1.0
Text: updated DESCRIPTION and NAMESPACE due to changes in Rcpp
Version: 1.0
Text: change in package maintenance: Thomas Kiefer is now the package
maintainer
Version: 1.0
Text: fixed a bug in item labeling in tam.se (thanks to Sebastian
Weirich)
Version: 1.0
Text: fixed a bug in labeling of reduced reponse matrices in
tam.mml.mfr
Version: 1.0
Text: fixed some examples in .Rd files
Version: 0.91
Text: added 'AXsi_' as value in tam.mml, tam.mml.2pl and tam.mml.mfr
Version: 0.91
Text: cleaned labels in 'tam.mml.mfr' for faceted models
Version: 0.91
Text: included the argument 'score.resp' in tam.wle for scoring a new
dataset different than the one which is used for item
calibration in tam (requested by Jan Boehnke)
Version: 0.91
Text: added examples for applying a sum constraint of item parameters
in 'tam.mml' (request by Kelvin Gregory)
Version: 0.91
Text: included argument 'adj' in tam.jml/tam.jml2 for modifying the
adjustment in case of perfect scores (thanks to Courtney
Castle)
Version: 0.91
Text: included dataset 'data.timssAusTwn.scored'
Version: 0.91
Text: included summary for tam.jml
Version: 0.91
Text: use plausible values for calculation in item fit (in tam.mml.fit)
Version: 0.91
Text: included an example for creation of user-defined fit statistics
Version: 0.9
Text: removed blanks in item category labels in tam.ctt2 and tam.ctt3
Version: 0.9
Text: allowed non-integer group labels
Version: 0.9
Text: fixed a bug in data preparation for facet models which appeared
since a change in TAM 0.7 (thanks to Jonathan Williams)
Version: 0.8
Text: changed rating scale parametrization for unequal number
categories per item
Version: 0.8
Text: included a warning in tam.ctt2 if memory allocation is reached
Version: 0.8
Text: included deviance plot 'plotDevianceTAM' (thanks to Sebastian
Weirich)
Version: 0.8
Text: included tam.ctt3
Version: 0.7
Text: include crossprod in some functions
Version: 0.7
Text: fixed a bug for using latent regression models in facet model
function 'tam.mml.mfr' (thanks to Jonathan Williams)
Version: 0.7
Text: included another facet example (Example 14)
Version: 0.7
Text: fixed a bug in tam.mml.mfr if all facets possess the same number
of levels
Version: 0.7
Text: fixed a bug in multidimensional generalized partial credit model
estimation and speeded 2PL estimation a bit
Version: 0.7
Text: included bifactor model and exploratory factor analysis ->
function 'tam.fa' with arguments irtmodel='efa','bifactor'
Version: 0.7
Text: now printing progress in tam.ctt2 correctly
Version: 0.7
Text: fixed a bug in data processing in tam.mml.mfr for factor or
string input of facets
Version: 0.7
Text: included more examples in tam.fit, anova.tam.mml, tam.pv,
tam.jml, tam.se, tam.wle
Version: 0.7
Text: avoided inversion of singular matrices in multidimensional WLE
estimation tam.wle (thanks to Iasonas Lamprianou)
Version: 0.7
Text: removed bugs for item response datasets with only one item in
tam.mml and tam.mml.2pl
Version: 0.7
Text: fixed a bug in tam.ctt2: multiple groups were not displayed
Version: 0.7
Text: included an option for deleting redundant generalized items which
sometimes improves computation speed
Version: 0.7
Text: cleaned the TAM manual (thanks to Michaela Mayr)
Version: 0.7
Text: changed output structure of tam.fa and included rotation examples
in tam.fa.Rd
Version: 0.7
Text: included additional convergence stabilizing approach which can be
activated using the argument 'fac.oldxsi' in control -> See
Example 15 for such a non-converging model where changing
algorithmic defaults seems necessary (problem addressed thanks
to Sebastian Weirich)
Version: 0.7
Text: substituted internal 'theta.sq' function by Rcpp based function
'theta.sq2'
Version: 0.7
Text: started with including examples similar to the ones in the
ConQuest 2.0 manual (see data.cqc.Rd)
Version: 0.6
Text: fixed a bug when in latent regression when providing a formula in
argument 'formulaY'
Version: 0.6
Text: fixed a bug in output of tam.se (thanks to Sebastian Weirich)
Version: 0.6
Text: included a faster alternative to tam.ctt -> tam.ctt2 is based on
a Rcpp function
Version: 0.6
Text: allowed freeing beta constraints by the user by including the
possible argument beta.fixed=FALSE
Version: 0.6
Text: removed a bug in data processing for faceted designs (thanks to
Michaela Mayr)
Version: 0.6
Text: fixed a bug with varying string lengths of facet levels
Version: 0.6
Text: fixed a bug in tam.ctt2 for numeric input matrices
Version: 0.6
Text: fixed incorrect handling of constraints in regression
coefficients which was just included in a recent 0.6 version
Version: 0.6
Text: fixed an output bug in tam.wle in multidimensional models (thanks
to Jan Henning-Kahmann)
Version: 0.6
Text: accelerated estimation of multdimensional models (different
approach of calculating the prior distribution)
Version: 0.6
Text: fixed a bug when submitting xsi.inits and beta.inits to tam
Version: 0.6
Text: fixed a bug in facet models when a facet contains only one
element (twice thanks to Michaela Mayr)
Version: 0.6
Text: included irtmodel='PCM2' (partial credit model with ConQuest
parametrization) and irtmodel='RSM' (rating scale model)
Version: 0.6
Text: added a longitudinal data example in 'tam.mml' manual
Version: 0.5
Text: included data.ex11 example dataset
Version: 0.5
Text: removed a bug in WLE calculation for multifaceted designs
Version: 0.5
Text: avoided warning in cov2cor for tam.mml.2pl function (thanks to
Linda Graefe)
Version: 0.5
Text: included argument increment.factor for obtaining convergence
behavior in bad suited data constellations
Version: 0.5
Text: changed default of np.adj in tam.pv to 8
Version: 0.5
Text: included two helper functions written in Rcpp in plausible value
imputation function tam.pv for better performance
Version: 0.5
Text: included S3 plot method
Version: 0.5
Text: included data.numeracy and data.timssAusTwn datasets
Version: 0.4
Text: [*** First CRAN Release ***] * included quasi-Monte Carlo
integration as an alternative to stochastic integration *
multifaceted model completely implemented * print warning if
there are items in resp with only zeroes (thanks to Ronny
Scherer) * fixed a bug in tam.wle, tam.pv and tam.se * fixed a
bug in creating design matrices for faceted designs * changed
initial xsi values for indetermined parameters (thanks to
Sebastian Weirich) * included function for calculating
Thurstonian thresholds * included Rcpp function in M step for
calculating item parameters * fixed a bug for partial credit
models * included parametrization of the dispersion model for
ordered data * included a function tam.ctt for calculating some
statistics based on classical test theory * fixed a bug in
tam.mml.2pl with irtmodel="GPCM" for models with differering
numbers of item categories
Version: 0.3
Text: cleaned Rd manual files a bit
Version: 0.3
Text: included standard errors in tam.mml and tam.mml.2pl
Version: 0.3
Text: included summary.tam and summary.tam.mml
Version: 0.3
Text: included anova.tam for model comparisons
Version: 0.3
Text: fixed a bug in multiple group estimation during tam.mml and
summary application
Version: 0.3
Text: fixed a bug in WLE estimation in the multdimensional case
Version: 0.2
Text: removed bugs in tam.pv for sampling plausible values with the
argument normal.approx=FALSE (thanks to Sebastian Weirich)
Version: 0.2
Text: included seed for stochastic integration in the tam control
argument
Version: 0.2
Text: fixed a bug in stochastic integration (thanks to Steffen Brandt)
Version: 0.2
Text: fixed a bug in the calculation of reliability and person
parameter estimates when applying stochastic integration
(thanks to Steffen Brandt and Caroline Just)
Version: 0.2
Text: use estimated parameters with minimal deviance in the output
(thanks to Ulrich Schroeders and Steffen Brandt)
Version: 0.1-03
Text: 2PL calibration outsourced
Version: 0.1-03
Text: designMatrices and tam.mml.mfr method for multifacet rasch model
calibration included. Both highly experimental.
Version: 0.1-03
Text: Examples for the calibration included, see help file of sim.mfr