Ordinal IRT models were implemented including GPCM, PCM, RSM, and
GRM. Comparison of nested models (GPCM, PCM vs. RSM) is available.
Minor updates
Data upload logic improved.
Data not uploaded to global environment.
Bug fixes
Fixed misplaced legend in the DD plot (in the interactive app).
plot_corr() no longer warns about unknown labels.
Reports work now even when Correlation structure is requested.
Item names with special characters should be now properly handled in
PDF report.
ShinyItemAnalysis 1.5.5
Bug fixes
Data upload was fixed.
Installation of the modules from the app now works even in
R sessions without any CRAN mirror set.
ShinyItemAnalysis 1.5.4
Major updates
R >= 4.1.0 is now required.
Modules installation is now provided in the application itself in
the Modules section. This feature is only enabled when the
application is run locally.
Minor updates
ShinyItemAnalysis does no longer reexport %>%
operator from magrittr package. The native pipe operator
|> in used instead, internally.
The confidence level for Cronbach’s alpha in the
Reliability section is now stated.
If the interactive application is run locally, the visitors counter
is no longer displayed.
Wording in PDF/HTML reports was edited.
Bug fixes
Correlation test in
Item analysis / Item criterion validity is now properly
formatted.
Criterion type recognition in
Item analysis / Item criterion validity is now fixed
(criterion with less than 7 unique levels is considered as discrete
variable).
ShinyItemAnalysis 1.5.3
Minor updates
New methods are offered in
Generalized logistic regression in the
DIF/Fairness section of the app. {difNLR} version 1.5.0 is
now required for the DIF analysis.
ShinyItemAnalysis 1.5.2
Bug fixes
The starting values and estimation constraints structure in
fit_blis() function were fixed to work with the new version
of the mirt package (versions 1.43 onwards).
Missing parts of the Logistic regression note in “DIF/Fairness –
Method comparison” tab of the app were fixed.
ShinyItemAnalysis 1.5.1
Major updates
run_app() function discovers for add-on modules
available on SIA repository which are not installed yet, and offers
their installation.
Minor updates
There are now documented options and environment variables that are
consulted by ShinyItemAnalysis package, see
?ShinyItemAnalysis_options.
In Data/Data tab, new section called Current data was added to
explicitly track the current data used in the app and its source.
Bug fixes
The number of iterations (EM cycles) for IRT models provided in the
Settings is now considered in the app again.
The app won’t crash anymore when the user uploads nominal data
without the key.
ShinyItemAnalysis 1.5.0
Bug fixes
Calculation of itemfit p values was fixed in the Table of estimated
parameters in IRT model/Dichotous models section of the app
(Thanks to Samsul Hadi for reporting this issue).
Calculation of worst split-half coefficient was fixed to respond to
updates in the psych package.
Major updates
Additional modules can now be easily incorporated into the Shiny
app! Shiny app discovers for installed modules and adds them in
respective sections. Modules can be kept in external packages. See
SIAmodules R package for default modules.
New dataset CLoSEread6 was added and it is also offered
as a toy dataset in the Data/Data section of the app.
DIF analysis now offers combinations (simple and iterative) of
purification and p-value adjustment in the DIF/Fairness
section of the app.
Minor updates
The plot_corr() function is now more verbose and
handles errors in polychoric correlations estimation in a more
user-friendly way; the partial matching of arguments is no longer
supported
Data upload and treatment of missing values was clarified and
slightly updated in Data/Data section of the app.
All data are now downloadable in Data/Data exploration
section of the app.
Error messages caused by missing values were made more specific in
DIF section of the app.
Summary table of total scores was complemented by number of complete
cases and explanations in the Scores/Total scores and
DIF/Observed scores section of the app.
Cutscore for hiding loadings was lowered to 0.2 in
Validity/Factor analysis section of the app.
Interfactor correlations were added for oblique rotation and
n_factors > 1 in the Validity/Factor analysis section of
the app (Thanks to Stanislav Ježek for suggesting this feature).
HCIlong dataset now contains zscore
variable.
Some of the HeightInventory dataset variables were
renamed, new variable total was added.
Dependency on the psychometric package was
removed.
Anxiety dataset is now offered as a toy dataset in the
Data/Data section of the app.
Dataset CZmaturaS is newly offered as a toy dataset in
the Data/Data section of the app.
ShinyItemAnalysis 1.4.2
Bug fixes
Item criterion validity - Distractor plot was fixed in Item Analysis
tab.
Major updates
New datasets HCIlong, MSATB,
GMAT, EPIA added
anxiety dataset was renamed to Anxiety,
variables score and zscore were added
Variable total was added to datasets HCI,
HCItest
Minor updates
Parallel analysis plot has an improved legend in the
Validity / Factor analysis tab
ShinyItemAnalysis 1.4.1
Bug fixes
gDiscrim() function was fixed to assure indices are
inside the defined bounds, also for small samples
plotDistractorAnalysis() function was fixed not to
display double legends. Thanks to Scarlett Escudero for reporting this
issue.
Item difficulty/discrimination plot in Tradition item analysis tab
in the app was fixed to prevent error messages when Discrimination type
is set to “none”.
Displayed item parameters were fixed and subsequently extended in
the app for the Bock model (see Major updates).
The training sections for GRM IRT model was fixed to display
category plots also for case of k = 6.
Major updates
The ItemAnalysis() has been refactored substantially;
memory demands are lowered multiple times, as well as run times (most
noticeable with large datasets). The changes include following:
The function now returns NAs for “gULI” when
k, l, and u arguments are not
specified, as there are no sensible defaults. Previous defaults resulted
in exactly the same values that ULI already provided on its own.
The Index.rel.drop is not provided anymore, as it is
not well defined (see Gulliksen, 1950, for more details on reliability
index (Index.rel)).
The bin and add.bin arguments were
removed, the analysis on binarized data can be conducted by simply
providing the cutscore in the cutscore argument.
The criterion argument now defaults to
NULL instead of "none", but behaves the
same.
Deprecated arguments data, y are now
defunct.
The DistractorAnalysis() and
plotDistractorAnalysis() functions have been improved:
argument items allows options "all" to apply for all items
(default), or a vector of item names (column names of
Data), or item identifiers (integers specifying the column
number).
The Anxiety dataset was added.
Baseline Logit Slope-Intercept (BLIS) parametrization for Bock
nominal response model is now available as a package function. Fitted
model supports IRT reparametrization (to so-called BLIRT) using a
standard coef() method as well.
The app training sections for NRM IRT model now includes parameters
in parametrizations and identification restrictions assumed by Bock
(1972), Thissen et al. (2011), as well as BLIS and BLIRT
parametrizations accounting for the correct option.
The DIF section in the app was updated to work with the newest
difNLR package version.
Minor updates
gDiscrim() newly issues a warning when item(s) range is
zero and when there is no difficulty difference in either group.
In gDiscrim(), the groups are newly defined using the
quantile() function. In the case of ties, the respondents
with the same total score are now in the same group, the groups sizes
may thus differ, but are now exactly defined. The function may however
provide different numerical results than in the previous version.
In gDiscrim(), you can now change how the dataset is
split by passing arguments to findInterval().
RStudio Addin was added to provide command-free app startup option,
bindable to a keyboard shortcut.
The HCI data now includes total score variable.
ShinyItemAnalysis 1.4.0
It includes version 1.3.8 and following further changes:
Bug fixes
Math in downloadable tables is now completely correctly transformed
to human-readable (non-LaTeX) format everywhere (thanks to Larry Nelson
for reporting this issue).
Major updates
The package dependencies that are used only in the interactive app
per se were moved into Suggests, meaning you are
now not obliged to install any of these dependencies if you plan to only
use the package’s “core” functions, such as DDplot() or
ItemAnalysis().
The startShinyItemAnalysis() function now checks for
dependencies required for its proper run and offers to install these
dependencies if any of them is not available.
New dataset HeightInventory was added.
Minor updates
Manuals of R functions and data were updated
ShinyItemAnalysis 1.3.8
Bug fixes
Better treatment of missing values in fa_parallel and in the
Validity/Factor analysis section of the app, preventing
crashes of the app (Thanks to @koenderks for reporting this as issue
#460)
Math in downloadable tables is now partly correctly transformed to
human-readable (non-LaTeX) format, including the IRT tab.
Major updates
startShinyItemAnalysis() gained an alias
run_app().
New dataset AttitudesExpulsion was added.
DIF-C SIAmodule newly available from the
DIF/Fairness section of the interactive app
IRR-restricted SIAmodule replaced the
Reliability/IRR-restricted section of the interactive
app
Math typesetting is now completely carried out by KaTeX, a
lightweight and reliable library. By eliminating MathJax, the app now
loads faster and no math is left unrendered.
Minor updates
Sample R code was added for the
Validity/Correlation structure section.
Manuals of R functions and data were updated
The app now uses trivial Cronbach alpha internal function, lowering
the number of dependencies
www folder was cleaned up, .png replaced by .svg files
improving the resolution of plots
README.md assets moved to .readme_assets folder
inst folder structure was simplified
ShinyItemAnalysis 1.3.7
Bug fixes
Bug with reading ordinal data in the app was fixed. (Thanks to
pukelevicius for reporting on GitHub)
Bug with uploading data with all correct/wrong answers in some items
was fixed (Thanks to Koen Derks for reporting the issue on GitHub)
Major updates
New datasets MSclinical, BFI2, and
TestAnxietyCor were added, some datasets and manuals were
updated.
Functions fa_parallel() was updated, smaller changes
were made in some other functions
In the Validity section of the app, tab
Factor analysis was updated.
In the IRT section of the app, tab for the Bock model
was updated to offer parametrization closer to regression models.
Minor updates
Sample R code was updated for the IRT section.
ShinyItemAnalysis 1.3.6
Bug fixes
Function ItemAnalysis() updated to avoid error messages in case of
datasets including 2 items only. (Thanks to Frederic Hilkenmeier for
reporting this issue.)
Data upload in the app was fixed, as well as the warning messages
related to data upload.
In the Reports section of the app the default name of
the dataset was set to the name of the csv file. This fixed some of the
bugs with the HTML report download.
Major updates
New function fa_parallel() was added offering fast
paralel analysis for deciding on number of factors in exploratory factor
analysis.
New datasets CZmatura and CZmaturaS were
added.
Some UI code of the shiny app was reorganized into separate
sections.
In the Validity section of the app, a new tab
Factor analysis was added offering exploratory factor
analysis.
In the IRT models section of the app, the binary IRT
models were collapsed into a single Dichotomous models
tab.
In the IRT models section of the app, the Bock IRT
model section was edited.
In the DIF/Fairness section of the app, the logistic
and the polytomous regression models now offer both the IRT and the
intercept-slope parametrization; the total score is newly offered as the
matching criterion besides the standardized total score.
In all sections of the shiny app, the wording was edited.
The ggWrightMap() function was rewritten to exclude dependencies
other than ggplot2.
Minor updates
The sample R code snippets were moved to a separate directory.
In the Criterion validity and
Item criterion validity, the Pearson correlation is newly
used as the default option.
In the shiny app, the item criterion validity analysis was moved to
the Item analysis section.
In the Item analysis section of the app, default
discrimination was changed to RIT.
Softer deprecation with warning only was applied to functions.
In the shiny app, term Observed ability is now
consistently used instead of (DIF/DDF) Matching variable.
The changes done were especially in the Data,
Regression models and the DIF/Fairness
sections of the app, and in the plotDIFLogistic()
function.
Section Summary of the app was renamed to
Scores to beter reflect focus of this section.
In the Validity section of the shiny app, the
dendrogram is newly enabled even if numclust == 0.
In the Item Analysis section of the app, the tab
Distractors plot was renamed to
Item response curves to better reflect that empirical
response curves are also available for binary and ordinal items.
ShinyItemAnalysis 1.3.5
Bug fixes
Plots in the DIF/About section of the app were fixed
(uniform vs. nonuniform DDF is now correctly displayed).
Display of the discrimination index ULI was fixed for ordinal
items.
Bug in display of Multinomial regression parameters in case of the
IRT parametrization was fixed.
In the IRT training section, the calculation and display of item
information curves was fixed. (Thanks to Hynek Cigler for reporting this
issue.)
Calculation of minimal scores in the ItemAnalysis()
function was fixed.
Display of ICC in IRT models was updated to respond to updates in
the mirt package.
In the Regression section of the app, missplaced
SE for intercepts and slopes were fixed.
Major updates
A new section Reliability/Restricted range was added to
the app offering interactive examples demonstrating issues with
reliability estimates in restricted-range samples.
Continuous items are newly allowed, rater variable was added, data
upload and warning messages were updated.
New function ICCrestricted() for computing ICC in
restricted samples was added.
Functions gDiscrim(), DDplot() and
ItemAnalysis() were updated, variable names were
unified.
New function plot_corr() to compute and visualize an
item correlation matrix was added and implemented within the
ShinyItemAnalysis interactive app.
New datasets AIBS, NIH,
HCIgrads, HCItestretest,
HCIprepost and HCIdata were added.
startShinyItemAnalysis() function was fixed to finish
job persisting in the backgroud after the app is closed.
Figures can now be downloaded at once in DDF section of
the app.
Equations were unified in the Regression,
IRT and DIF/Fairness sections of the app, with
p being the index for person and i being the
index for an item.
Interactive training section was added to the
DIF/Fairness section, offering interpretation of
group-specific models.
Figures in the Validity, Regression,
IRT, and DIF/Fairness section are now
displayed in plotly mode in the shiny app.
The IRT/Rasch section was restructured and it now
offers both the intercept/slope as well as the IRT parametrization.
(This is planned for other IRT subsections in future
versions.)
The Regression/Multinomial section newly offers also
the IRT parametrization.
Minor updates
The intropage was updated, new News section was added.
Method ordering was updated in the DIF/Fairness
section.
Toy data selection was updated.
Selected R code was updated.
Unnecessary dependencies were removed.
Summary tab was updated within the app, interactive help with
formulae is newly offered.
Interpretation of IIC for selected theta were added in the
IRT/training section.
styler package was applied on .R files, documentation was
updated.
ggWright() plot was updated to more general
description.
References were updated wintin the app.
ShinyItemAnalysis 1.3.4
Bug fixes
Display of Cronbach’s alpha in PDF/HTML reports was corrected.
Item slider bug in ordinal regression models in the app was
fixed.
DIF matching criterion was synchronized for the Summary
and Item subtabs for the Generalized logistic regression
method in the DIF/Fairness section of the app.
Bug in display of table in the
Regression/Model comparison section was fixed.
Major updates
startShinyItemAnalysis() function was updated to allow
starting the application as a background job in Rstudio (default
setting). This permits the user to work and try sample R code examples
in the console.
Downloadable tables are newly provided in shiny app in the
DIF/Fairness sections for ordinal DIF.
DDplot is now displayed in plotly mode in the shiny app.
New function recode_nr() for recognizing and recoding
not-reached items was introduced.
ItemAnalysis() function was updated with new columns
for ratio of missed and unreached items, shortened column names and
ordering.
Traditional item analysis table in the Item analysis
section of the app has been expanded to include item reliability, item
validity, and percentage of missing and unreached for each item.
DDplot() function now offers argument
criterion. Without criterion specification,
the difficulty-discrimination plot is provided. When
criterion is specified, the difficulty-validity plot is
provided instead, depicting item criterion validity.
Difficulty-validity plot is newly offered in the the
Validity/Criterion_Validity/Items section.
Minor updates
Documentation of DDplot() was updated.
All datatable outputs now have proper bootstrap style/theme.
ShinyItemAnalysis 1.3.3
Bug fixes
plotDIFLogistic() now correctly plots matching
criterion when item purification is applied.
Major updates
Use of DIF matching criterion other than Total score is now enabled
in shiny app in the DIF/Fairness sections.
Downloadable tables are newly provided in shiny app in the
DIF/Fairness sections.
Iterations of purification process are now displayed in downloadable
tables in the DIF/Fairness sections of shiny app.
DIF method comparison table is provided in the
DIF/Fairness section of the shiny app.
Minor updates
Help page for the ShinyItemAnalysis package was
added.
NEWS file is now formatted using markdown.
On attach message was updated.
Wording, Figures and page structure were updated in shiny app in the
DIF/Fairness sections, histogram of total scores now better
compares the groups.
ShinyItemAnalysis 1.3.2.
It includes versions 1.3.1-1 - 1.3.1-8 and following
changes:
Bug fixes
Mismatch in specification of H0 and H1 was corrected in
DIF/Fairness section and in the Report
section.
plotDIFLogistic() now correctly plots matching
criterion.
Logistic method in the DIF/Fairness section now
correctly plots best fitting model when p.adjust.method is applied.
Logistic method in the DIF/Fairness section now
excludes missing values.
Major updates
New dataset LearningToLearn was added to the
package.
New toy datasets LearningToLearn6 and
LearningToLearn9 were added to the app.
Upload of the DIF matching criterion is now available in Data
section of the app.
D-DIF index calculation was added into DIF/MH/Item to evaluate DIF
effect size
OR calculation in DIF/MH was edited.
plotDIFLogistic() function was updated to accept class
of Logistik as input.
plotDIFLogistic() now accepts character input for
item argument.
Summary and Item inputs in DIF/Logistic are connected now. Model is
now fitted only once.
Minor updates
Citation and list of References were updated.
Authors’ details were updated.
Due to changes in difNLR, function
ddfORD()was renamed to difORD().
About page was updated.
Error messages for DistractorAnalysis() and
plotDistractorAnalysis() were unified.
Copyright year in footer is now responsive.
Description of toy datasets was updated.
styler package was used for all functions. Documentation was
updated.
For plotDIFLogistic() it is now possible to turn off
plotting empirical probabilities. This can be done using
draw.empirical = FALSE.
Selected R code was updated in DIF/MH
Threshold for discrimination can be now specified in DDplot()
function via argument thr. Default value is 0.2.
Warning and error messages were updated for
plotDistractorAnalysis() function when key is
missing.
Width of inputs was unified in DIF/Fairness
section.
Wording was updated.
Some typos were fixed.
Text in reports was updated.
Some examples were set to run to allow for automatic checks of the
package.
ShinyItemAnalysis 1.3.1-8.
Bug fixes
Typos in plotAdjacent(), plotCumulative()
and plotMultinomial() were fixed.
ShinyItemAnalysis 1.3.1-7.
Major updates
Functions DistractorAnalysis() and
plotDistractorAnalysis() were updated to not requiring
key input.
ShinyItemAnalysis 1.3.1-6.
Bug fixes
Bug in key uploading was fixed. When nominal data was uploaded and
then ordinal (without cut-score specified in file), key was kept from
nominal data.
Bug in ordinal data was fixed. Recalculation of factors to numeric
is done.
Some calculations with NA values were fixed.
Double file input "key" was unified.
Minor updates
Item names for toy dataset Science were updated.
Basic summary table for ordinal data was updated.
ShinyItemAnalysis 1.3.1-5.
Bug fixes
Table for MH in PDF reports was fixed.
Header of sections were fixed in PDF reports.
IRT parameter estimates table was fixed in PDF reports.
Bug in plotMultinomial() for data without NAs was
fixed.
Major updates
DIF/DDF detection methods for ordinal data were added. DIF/Fairness
section was updated.
Minor updates
Tabs in Regression were renamed.
Warning when group vector is missing was added into Method
comparison tab in DIF/Fairness section.
Method comparison tab for DIF/Fairness section was
updated.
ShinyItemAnalysis 1.3.1-4.
Bug fixes
In DIF section, Summary table for total scores now displays correct
number of respondents in groups (N).
ShinyItemAnalysis 1.3.1-3.
Bug fixes
Bug in Adjacent model in Regression tab was fixed. Matching
criterion and parametrization inputs now have effect on model.
Bug in plotMultinomial() was fixed. Function now
displays more than 12 response patterns as linetype.
Minor updates
Range for x-axes in plotAdjacent() and
plotCumulative() were updated to avoid removing data.
Some typos were fixed.
ShinyItemAnalysis 1.3.1-2.
Major updates
Cronbach’s alpha with CI was added into reports.
Bonferroni correction for multiple comparison was added as an option
for correction methods in Regression, DIF and Reports tabs.
Minor updates
Warning for table for parameters in Bock’s IRT model was
modified.
Wright map now considers item names when option Keep item
names.
Some wording was updated.
Some typos were fixed.
ShinyItemAnalysis 1.3.1-1.
Bug fixes
Minimal number of groups for gULI in DDplot was set to 2 in both
Item analysis and Report tabs.
Major updates
Mantel-Haenszel test was added into reports.
Minor updates
Error for DIF/Logistic was customized.
Text in reports in DIF section was updated.
Tables in DIF section now includes both p-values and adjusted
p-values when correction method is applied.
Warning for fancyhdr latex package was solved.
ShinyItemAnalysis 1.3.1.
It includes versions 1.3.0-1 - 1.3.0-18 and following
changes:
Minor updates
In ItemAnalysis() function, documentation for item
reliability and item validity indices has been added (Reported by Lot
Fonteyne).
ShinyItemAnalysis 1.3.0-18.
Bug fixes
Bug in plotDistractorAnalysis() was fixed. X-ticks are
now displayed even with discrete = T argument.
Minor updates
Inputs in Validity/Correlation overlaped when window was narrow.
Fixed.
Generate and Download buttons overlaped in Reports when window was
narrow. Fixed.
ShinyItemAnalysis 1.3.0-17.
Bug fixes
DistractorAnalysis() and
plotDistractorAnalysis() now handle discrete matching and
groups specified via argument cut.points.
Distractor plots in Validity/Items tab now properly handle discrete
criterion and the number of groups is correctly descreased when
criterion does not have unique cuts.
Bug in Raju in DIF/Fairness tab was fixed. Plots for
items are now displayed for dataBov dataset.
Major updates
Checking of unique cuts for distractor plots was added into Reports.
Warning is displayed when cuts are not unique and slider is
updated.
Minor updates
Some typos were fixed.
ShinyItemAnalysis 1.3.0-16.
Bug fixes
Bug in Bock’s model for binary items was fixed in reports.
Histogram when some levels of total scores are missing were fixed in
Summary and DIF tab.
Major updates
Legend was added into IRT plots when downloaded.
IRT models now respect ordering of items.
Minor updates
Some typos in IRT models tab were fixed.
ShinyItemAnalysis 1.3.0-15.
Bug fixes
DIF summary table bug was fixed. Table is disaplayed when some DIF
methods cannot be fitted.
DDF parameter tables were fixed for data BOV and Czech Trivia.
With difNLR package version 1.2.3 plots for DDF are
displayed even for binary data. Plots were also fixed for data Bov.
PDF Reports now work locally and on shinyapps.io.
Dendrogram now properly replaces item names when Keep item names is
not selected in Data upload section.
Minor updates
Authors’ and contributors’ details were updated.
Function plotMultinomial() was updated to return smooth
curves for any matching criterion.
ShinyItemAnalysis 1.3.0-14.
Bug fixes
Bug in Bock’s nominal IRT model was fixed. ICCs are now properly
displayed for all binary data. Error for non-displayable table of
parameters was further improved. Tables for items are displayed even in
case that table for all items is not.
DIF items are now correctly written in reports.
Corrplot now properly replaces item names when Keep item names is
not selected in Data upload section.
In DIF/Fairness section, histograms of Total scores for
groups are now properly displayed also for ordinal items.
Major updates
Legends for multinomial and distractor plots were improved.
Minor updates
Authors’ and contributors’ details were updated.
ShinyItemAnalysis 1.3.0-13.
Bug fixes
Bug in Bock’s nominal IRT model was fixed. ICCs are now properly
displayed for Czech Trivia dataset. Error for non-displayable table of
parameters was improved.
Bug in DistractorAnalysis() was partially fixed, need
to be revised.
Major updates
Reports:
long tables have now header on each new page
legend is now visible for IRT plots even when dataset consists of
more than 50 items
Matching criterion in plotMultinomial() was relaxed to
decrease size of reports.
ShinyItemAnalysis 1.3.0-12.
Bug fixes
Reports are now rendered even in case that multinomial model cannot
be fitted for some items.
With option Keep item names, names of items are properly displayed
in Report for DIF detection methods.
Model comparison table returns now also partial results when some
models cannot be fitted.
Bug in plotMultinomial() was fixed. In case of only two categories
observed, plot is displayed properly now.
Bug in DistractorAnalysis() was fixed. In case of
possibly discrete matching, matching is cutted based on its
factors.
Major updates
Uploaded data can be now unloaded without restarting app.
Distractor plot for validity analysis was updated to allow for
lowering the number of categories in cases when cuts are not uniquely
defined. Application was updated accordingly.
Minor updates
Errors and warnings were customized.
In all dichotomous models the number of EM cycles can be increased
in Settings.
Seed was set for validity boxplot for reproducibility of jitter
points.
All static DOI links were updated. (Thanks to Katrin Leinweber)
Some typos were fixed in reports.
ShinyItemAnalysis 1.3.0-11.
Bug fixes
Option for displaying session info in reports now functions
properly.
Option to display average score in DDplot in reports fixed.
Major updates
New function plotCumulative() which plots category
probabilities functions estimated by from nnet package was
added. It is now used in application.
New function plotAdjacent() which plots category
probabilities functions estimated by from nnet package was
added. It is now used in application.
New function plotMultinomial() which plots category
probabilities functions estimated by from nnet package was
added. It is now used in application.
Minor updates
Selected R codes for cumulative, adjacent and multinomial models
were updated.
Option for matching criterion (total vs Z-score) in multinomial
model was added.
Equations in DIF section are now center-aligned.
ShinyItemAnalysis 1.3.0-10.
Major updates
Alerts for analysis where data with missing values are omitted were
added.
DDplot() now can displayed average item score as
estimate of difficulty for ordinal data. See argument
average.score.
Minor updates
Correlation structure now use pairwise complete observations for
calculation of correlation.
ShinyItemAnalysis 1.3.0-9.
Major updates
DistractorAnalysis() and
plotDistractorAnalysis() functions were updated to allow
for lowering the number of categories in cases when cuts are not
uniquely defined. Application was updated accordingly.
Minor updates
Tables and equations of polytomous models in Regression section are
now center-aligned.
ShinyItemAnalysis 1.3.0-8.
Bug fixes
With option Keep missing values unfunctioning analyses
were fixed (missing data removed, warning message added)
Major updates
Multinomial regression plot is now displayed using smooth
function
Minor updates
With option Keep missing values warning message is now
displayed for those analyses for which missing values are omitted.
For ordinal data, Cronbach’s alpha is now calculated from original
ordinal (non-binarized) data both in Reliability and in Item analysis
section.
ShinyItemAnalysis 1.3.0-7.
Bug fixes
Busy indicator now properly displays above input tabs.
Bug when using matching in DistractorAnalysis() was
fixed.
Major updates
New ordinal toy dataset SCIENCE was added.
Minor updates
Each tab is now open at the top of the page.
ShinyItemAnalysis 1.3.0-6.
Major updates
Adjacent logistic regression model was implemented for ordinal
data.
Both adjacent and cummulative regression models allow for selection
of matching criterion (total score, standardized total score) and
parametrization (classical slope/intercept and IRT
parametrization).
ShinyItemAnalysis 1.3.0-5.
Bug fixes
SD in Regression section was changed to SE.
Keep missing values button is now functioning and it is applied for
ordinal and binary data.
Major updates
Cumulative logistic regression model was implemented for ordinal
data.
Delta method is now applied for calculation of SE in IRT
parametrization in cumulative logistic regression.
ShinyItemAnalysis 1.3.0-4.
Bug fixes
Bug in slider in histogram of total scores was fixed. Range is now
correctly displayed when NA values are present.
Fixing versions.
Major updates
Math mode is now stable in tables. (Thanks to Stéphane Laurent)
UI for polytomous models in Regression section was added.
Traditional item analysis table is done via ItemAnalysis() function.
It now includes also average score.
Minor updates
startShinyItemAnalysis() automatically launches default
web browser.
Sample code and wording was updated for traditional item analysis
table in app and also in reports.
ShinyItemAnalysis 1.3.0-3.
Minor updates
ggWrightMap() now can display user-specified names of
items (Reported by Matthew G R Courtney)
plotDIFLogistic() now can display user-specified names
of reference and focal group.
Some typos were fixed.
ShinyItemAnalysis 1.3.0-2.
Major updates
Analysis for ordinal items has been added. This includes use of
ordinal data in sections Summary (histogram of Total scores, success
rate), Reliability, Validity (correlations, predictive validity),
ShinyItemAnalysis 1.3.0-1.
Bug fixes
Equations for 3PL and 4PL regression models were fixed.
Major updates
Math symbols are now displayed using MathJax.
Exercises were added in IRT section / Polytomous Training.
DIF section now includes method comparison.
Minor updates
Labeling of correction methods in DIF section was improved.
Ability parameters are now available also for Bock’s model.
ShinyItemAnalysis 1.3.0.
It includes versions 1.2.9-1 - 1.2.9-3 and following
changes:
Minor updates
Reference to a new paper on ShinyItemAnalysis in The R
journal was added.
ShinyItemAnalysis 1.2.9-3.
Bug fixes
Histograms for total scores now handle cut-scores out of range of
observed values
Bug in reports when using delta plot with purification was
fixed.
Cut-scores for histograms are properly displayed in reports.
Year in reports was updated.
Major updates
Sections About, References and Settings are displayed only with icon
and are right-aligned.
Margins and padding were updated.
t-test was added for comparison of total scores between groups into
DIF section and into reports.
Histograms for total scores are now displayed in plotly mode.
Minor updates
Some math mode was fixed in IRT section.
Some typos were fixed.
Selected R code was updated in DIF/Total scores.
Animate function for sliders was slowed down.
ShinyItemAnalysis 1.2.9-2.
Bug fixes
Generalized ULI index is now correctly displayed in traditional item
analysis table in reports.
Item names are now correctly displayed in reports.
Item names are now correctly displayed in DDF section.
Function plotDIFLogistic() now handles user-specified
matching criterion.
Minor updates
Legend of DDplot was modified.
ShinyItemAnalysis 1.2.9-1.
Minor updates
Wording in PDF/HTML reports was edited.
ShinyItemAnalysis 1.2.9.
Bug fixes
IRT/Training/Dichotomous models - plots are correctly plotted.
Download buttons in IRT/4PL works now.
Major updates
TIF were converted into plotly.
Section Validity/FA is not accessible for now.
Minor updates
Selected R code for IRT/Bock’s model was updated.
Wording in IRT models was updated.
Wording in Reports was updated.
Legend for plots of IRT models was modified in Reports.
Ability estimates summary table is now round in Reports.
Some typos were fixed in Reports.
Colours of IRT summary plots correspond to model for Items.
ShinyItemAnalysis 1.2.8-7.
Major updates
IRT section of shiny app was updated and now provides new and more
shiny figures in plotly
PDF and HTML reports were updated and now allow
different types of correlation in corrplots
different types of discrimination indices in DDplots
summary table for ability estimates in IRT section
ShinyItemAnalysis 1.2.8-6.
Bug fixes
Dendrogram is now correctly rendered.
Major updates
Function ItemAnalysis() was added.
IRT section now allows download of ability estimates
Minor updates
Help pages for functions were updated.
ShinyItemAnalysis 1.2.8-5.
Bug fixes
Key for ordinal data for binarization is now correctly used. Values
greater or equal to value of the key are set to 1.
When NULL data is uploaded, default dataset GMAT is in use.
Major updates
Scree plot was moved into the new tab
Factor analysis.
Dendrogram was added into Correlation structure
tab.
Option for global cut-score for ordinal data was added.
R package ggdendro is now used.
Removal of items with only 0s or 1s now works.
Removal of observation with NA group now works.
Minor updates
Text in Data section was updated.
List of references was updated.
Selected R code in Correlation structure tab was
updated.
ShinyItemAnalysis 1.2.8-4.
Bug fixes
Bug in IRT models/Training/Dichotomous models text of theta in
plotly was fixed.
Major updates
Reorganization of data upload and renaming data variables.
test_answers()> nominal() correct_answers()> binary()
scored_test()> total_score() test_key()> key() DIF_groups()>
group() criterion_variable -> criterion()
And creating new variables: ordinal() ordinal data maximal() maximal
values for ordinal data minimal() minimal values for ordinal data
z_score() standardized total score, no need to use scale(total_score())
in each function
Minor updates
Updating text in Data section.
Editing boxes for data upload in Data section.
ShinyItemAnalysis 1.2.8-3.
Bug fixes
Bug in Regression/Nonlinear 4P IRT Z (rounding in interpretation)
was fixed.
Bug in IRT models/Training/Dichotomous models text of theta in
plotly was fixed.
Bug in IRT models/Training in plotly a ModeBar was fixed.
Major updates
Data upload now allows also ordinal data, min/max values can be
specified.
Validity/Correlation structure now allows selection between
Pearson/Spearman/Polychoric correlation, Polychoric is default for
binary data
DDplot now allows also ordinal items and offers different types of
discrimination indices to be displayed
Download of tables (as .csv files) is now provided for standard
scores, correlation matrix, traditional item analysis, and for parameter
estimates in IRT models.
Minor updates
Data upload now better points to “Upload data” button.
Precision was re-set for IRT models/Training tab. Now = 0.1.
ShinyItemAnalysis 1.2.8-2.
Major updates
gDiscrim() function has been extended to calculate
Upper-Lower Index (ULI) also for ordinal items
ShinyItemAnalysis 1.2.8-1.
Bug fixes
Bug in IRT dichotomous models comparison is fixed. (Reported by
Jean-Luc Kop)
Bug in IRT dichotomous models (3PL and 4PL) was fixed. Tables of
parameters are rendered even in case that EM cycles terminated without
convergence. In such a case SD of parameters are set to NA.
Bug in plotDIFLogistic() function was fixed. Function
now returns also item.name argument.
Bug in plotDIFirt() function was fixed. Function now
returns also item.name argument.
Major updates
Global setting for figure downloads was created. This can be changed
in Setting section.
ShinyItemAnalysis 1.2.8
It includes versions 1.2.7-1 - 1.2.7-7
ShinyItemAnalysis 1.2.7-7.
Major updates
Section Reliability was added.
Split-half methods including also Revelle’s beta were added
Cronbach’s alpha method with CI was moved to section
Reliability.
Spearman-Brown formula was added.
New function ggWrightMap replaced wrightMap from WrightMap
package.
Section IRT models
Selected R code for Rasch and 1PL models was updated.
Minor updates
Reference list was updated.
ShinyItemAnalysis 1.2.7-6.
Major updates
Section DIF/Fairness
Subsection Logistic IRT Z is deprecated.
Subsection Nonlinear IRT Z is now called Generalized logistic.
Subsection Generalized logistic includes now wide range of models
and different specification of DIF type.
Subsection SIBTEST was added, including SIBTEST method and
Crossing-SIBTEST method.
Minor updates
Reference list was updated.
ShinyItemAnalysis 1.2.7-5.
Minor updates
Some wording was updated.
Selected R code was updated.
Function theme_shiny is deprecated. New function
theme_app() was created and applied for all graphics,
including R functions in package.
ShinyItemAnalysis 1.2.7-4.
Minor updates
Paddings were adjusted.
Acknowledgments were updated.
ShinyItemAnalysis 1.2.7-3.
Bug fixes
Crashing of the app when upload no data was fixed.
Major updates
Data page
Design of data page was changed.
User can now specify encoding of missing values.
Basic summary was added.
ShinyItemAnalysis 1.2.7-2.
Major updates
Phone version
collapsible menu closes when clicked
ShinyItemAnalysis 1.2.7-1.
Bug fixes
Plotly files in IRT training section are now displayed with mode bar
due a bug in plotly package.
Minor updates
Some typos were fixed.
Link to google form for feedback was added into About section.
New R icon was added into footer.
ShinyItemAnalysis 1.2.7.
It includes versions 1.2.6-1 - 1.2.6-12
ShinyItemAnalysis 1.2.6-12.
Minor updates
Mirror at Charles University is no longer in use.
ShinyItemAnalysis 1.2.6-11.
Major updates
Function DDplot()
Limits for y-axis were adjusted when negative values of
discrimination are detected.
Warning for negative discrimination values were added.
Reports
Some unused parts of reports were excluded.
ShinyItemAnalysis 1.2.6-10.
Major updates
UI
Some parts were split from main ui.R file
IRT
Exercises in IRT training were extended.
Data
Bug in data upload was fixed. Now length of criterion variable is
correctly checked.
ShinyItemAnalysis 1.2.6-9.
Major updates
Packages - shinyBS is now required.
Data
HCI dataset was added into package.
Description of dataMedical was improved.
Description of training datasets was improved.
About
Page was improved.
IRT
Helps for interactive exercises were added.
Minor updates
Typos were fixed.
ShinyItemAnalysis 1.2.6-8.
Major updates
IRT
Expected item scores were removed from IRT training NRM.
Interactive exercises were added into IRT training - dichotomous
models.
ShinyItemAnalysis 1.2.6-7.
Major updates
Data
Graded data od Medical data set was added.
In all dataMedical data sets the criterion variable was renamed to
StudySuccess.
IRT
Expected item scores were added into polytomous models in IRT
training.
Selected R code was updated in IRT training.
Minor updates
IRT section
Colors of sliders and curves in IRT training section were
adjusted.
ShinyItemAnalysis 1.2.6-6.
Major updates
Regression
NLR 4P model was added into model comparison.
Minor updates
README file was updated. Typos were fixed.
Design of figures was unified.
Download button options were unified.
Selected R code syntax was improved in some sections (IRT only
partionally, DIF not).
Selected R code was improved for first 4 sections.
Some wording was improved.
ShinyItemAnalysis 1.2.6-5.
Major updates
IRT section
Wording for IRT training was added and improved.
Selected R code syntax was improved in some sections. This can be
done with txt <- gsub(“”, “ ”, txt) txt <- gsub(” “,” “, txt)
txt where txt is R code in”“.
theme_shiny was created as a default theme for all figures. Now it
is used only partionally.
Minor updates
README file was updated. Typos were fixed. Links were added. Hexbin
was added.
References were updated.
ShinyItemAnalysis 1.2.6-4.
Major updates
IRT section
Selected R code was added into polytomous models.
Equations were added into polytomous models.
Download buttons were added into polytomous models.
4PL model was added.
4PL model was added into model comparison.
Sliders in IRT training are now colored with respect to line
colors.
Regression section
Section is newly organized.
NLR 4P model was added.
Reports
4PL IRT model was added as an option.
IRT equation is generated based on selected model only.
Unnecessary files were deleted. Some cleaning of files was
done.
Minor updates
IRT section
Selected R code in model comparison was updated. Typos were
fixed.
Regression section
Interpretation of NLR 3P model was extended.
Syntax for NLR 3P model was improved.
ShinyItemAnalysis 1.2.6-3.
Major updates
IRT section
IRT section is newly organized.
IRT training section was expanded by polytomous models. GRM, GPCM
and NRM were added.
Syntax for IRT training was improved.
Minor updates
IRT section
Sliders steps are now 0.01 in dichotomous models.
ShinyItemAnalysis 1.2.6-2.
Minor updates
Numeric inputs were removed from IRT training section.
Selected R code was extended in IRT training section by item
information function plot.
References were updated.
Mirror web link was updated.
ShinyItemAnalysis 1.2.6-1.
Bug fixes
Reports with DDF but none DDF item are now correctly generated.
Minor updates
Hexbin
was added into footer.
is now as shortcut icon.
Paddings
in large devices was adjusted.
in small devices was adjusted.
Unnecessary files were deleted.
Reports
Some wording in reports was improved.
PDF report text is fully justified.
Subsections characteristic curves is not visible when none DIF or
DDF item is present.
Some typos were fixed.
Some parameters were renamed. The unnecessary ones were
removed.
ShinyItemAnalysis 1.2.6
Major updates
UI for DIF/Fairness section was updated.
References were added into About page.
New design of reports is now available. Design of PDF reports was
updated.
Wording in report was improved.
DIF/Fairness section in report was improved.
New hexbin for ShinyItemAnalysis was created and added
into reports.
Sample code in DIF/Fairness IRT Lord and IRT Raju was
extended to 1PL, 2PL and 3PL models.
Bugs fixing
Wording in regression plots was fixed.
Examples in DIF/Fairness IRT Lord and IRT Raju were
fixed.
Function plotDIFirt() now can be also used for only one
item.
Minor updates
Reference list was updated.
CITATION file was modified.
In Summary page the description for summary table was added. The
sample code was updated.
Wording in summary statistics in Summary section was improved.
Description of Session info section in reports was added.
ShinyItemAnalysis 1.2.5
Major updates
Correlation plots now offer reordering by hierarchical clustering.
Several linkage methods are offered. This is also included in
reports.
Confirmation of data upload was added. Also warnings and errors are
displayed in case that something went wrong when uploading.
In IRT training
parameter theta (latent ability) is now included
the interpretation for characteristic curves is provided
horizontal and vertical lines for specified theta were added into
plot for characteristic curves
selected R code was added.
In multinomial regression bug when only two choices in data are
present was fixed.
Minor updates
Link for Adela’s website was added.
Columns for BIC and its adjusted version were swapped in table for
IRT models comparison. Text above table was also updated.
In IRT section dpi of downloaded plots was set to 300.
In IRT training downloaded plots also include legend with
parameters.
In all IRT models table with parameters includes all parameters a,
b, c, d.
In IRT training equations were moved above interpretation.
ShinyItemAnalysis 1.2.4
Minor updates
Reports were mildly updated.
Resolution of figures in reports was increased (now 300ppi)
Dependencies were updated.
Some typos fixed.
Legends of plots were unified and placed in better way for
NLR IRT Z
DDF
function plotDIFLogistic()
Bug in item names for DDF subsection of
Fairness/DIF section was fixed.
ShinyItemAnalysis 1.2.3
Major updates
Report’s customized options were extended. Reports now include also
dynamic description.
Author and dataset name can be now filled and add into reports.
Dataset difMedical was renamed to MSAT-B
according to difNLR package. Its description was mildly
updated.
Purification options were added into Nonlinear IRT Z
and DDF subsections of DIF/Fairness
sections.
Purification options was added DDF analysis in
Reports section when customized setting is selected.
Minor updates
Size of plots and font in plots was changed for reports.
Plots in HTML report are now centered.
Wording of reports’ default option was updated.
References were updated in Reference section and also
in README file.
Wording of Spearman test in Validity section was mildly
updated.
ShinyItemAnalysis 1.2.2
Major updates
Design of reports was edited.
Several bugs were fixed:
Bug when creating report for uploaded data was fixed.
Bug when creating report for data without predictive criterion or
DIF group was fixed.
ShinyItemAnalysis now uses plotly
package!
Minor updates
Design and options of Report page were updated.
Layout of IRT curves training page was mildly changed. There are now
two curves in each plot. Also text area input was added and synchronized
with sliders. Colour of sliders now correspond to colour of curve.
ShinyItemAnalysis 1.2.1
Major updates
Several bugs were fixed:
Interpretation of regression models was fixed.
Interpretation of text about correlation in Predictive validity was
fixed.
ShinyItemAnalysis now used also data.table
package.
Data page was divided into two subpages to avoid long rendering of
tables. when changing datasets.
Function gDiscrim() to calculate generalized
discrimination was implemented.
Function DDplot() was edited to be able to handle
generalized discrimination. Double slider was added into
Traditional analysis page.
Traditional analysis table was extended by adding column with
generalized discrimination. This is done also in reports.
Some pages has now their own source code files:
Summary - Summary.R
Validity- Validity.R
Traditional analysis - TraditionalAnalysis.R
Regression - Regression.R
IRT models - IRT.R
DIF/Fairness - DIF.IRT
Minor updates
Last three rows in regression comparison table are now bold.
Reference list was extended.
The subpage Distractors of Item analysis
page was mildly edited.
Generalized DD plot was removed from Distractor
subpage. It is now available on Traditional item analysis
subpage.
Item patterns frequency plot is now made with ggplot2
package.
Names of downloaded plots were customized and their resolution was
increased and size of text was descreased in some pages:
Summary
Validity
Item analysis
Regression
ShinyItemAnalysis 1.2.0
Major updates
ShinyItemAnalysis can now handle missing values. Newly
there is an option to handle NA values as zeros in scored data.
Bug in WrightMap was fixed.
We have new contributor - Lubomir Stepanek!
New online mirrors were added.
Busy indicator and tooltips were added.
Structure of application was mildy updated.
Datasets dataMedical, dataMedicalkey,
dataMedicaltest were updated. Group variable and criterion
variable were added.
The newest versions of some packages are now required
(difNLR v 1.0.2, difR v 4.7,
ggplot2 v 2.2.1, mirt v 1.24,
shiny 1.0.3 and shinyjs v 0.9).
DIF/Fairness
Option of item purification was added into some DIF detection
methods - Delta plot method, Mantel-Haneszel, Logistic regression with
total score, Lord’s test and Raju’s test.
Default option of p-values adjustments in DIF detection methods was
set to none.
Bugs in DIF Logistic IRT Z and DIF Nonlinear IRT Z tables of
parameters were fixed.
IRT models
IRT models are now fitted only by mirt package.
Training plots of item characteristic and information curves were
added into IRT models section.
Pearson’s correlation coefficient between factor scores and
standardized total score was added for Bock’s nominal IRT model.
Reports
New options for reports were added. By default no IRT models and no
graphs of correlation structure are fitted.
Reports are now described in detail.
The settings of reports are now also offered in Report section.
Generation of reports is now done part by part. Once it is finished,
the download button is offered.
Message boxs with warning for generation and download of reports
were added.
Validity analysis:
Validity analysis of predictive outcome is now included on Validity
page in Predictive validity section.
Now it is possible to upload predictive outcome.
Dataset GMAT and GMATtest from
difNLR package include now criterion variable which can be
used in Predictive validity section.
Functions DistractorAnalysis() and
plotDistractorAnalysis() were extended by
matching argument.
Item analysis
Barplot of answer selection proportion was added into Distractor
subsection.
Diagram of custom discrimination - new version of DD plot - was
added into Distractor subsection.
Minor updates
CITATION file was added.
Maximum upload size was set to 30MB.
Item names were fixed and unified.
Some typos were fixed.
Readme file was updated.
Reports design was slightly updated.
Code was slightly updated to correspond to new versions of packages
difNLR, mirt and ggplot2.
Selected code was updated.
Package dependencies were updated (packages knitr and
xtable are now used in report generation).
Minor bug in DIF IRT (Lord and Raju) plots and downloads was
fixed.
Designs of footer and navigation bar were updated.
The version for small media was designed.
Weblink for version 1.1.0 was created.
Reference list was expanded and links to online versions of articles
were added.
ShinyItemAnalysis 1.1.0
Major updates
New overall appearance using shinythemes package.
New datasets dataMedical, dataMedicalkey,
dataMedicaltest were added into the package.
New dataset is offered in example datasets inside the shiny
app.
Bug in Distractor plots for uploaded data was fixed.
Calculation of Success Rate in Standard Scores was fixed.
Differential Distractor Functioning detection method was added.
Syntax of difNLR functions was edited to response to
new version of package.
Function plotDIFirt() was updated.
Correlation structure section was added including correlation plot
and scree plot.
Pages structure was changed and updated.
IRT models are now fitted by mirt package.
Subsection IRT model selection was added into IRT models
section.
Wrigh maps were added for Rasch and 1PL IRT model.
Bug in data upload was fixed.
Subsection regression model selection was added into Regression
section.
Minor updates
Typos were fixed.
Selected R code was updated.
Description of data including uploading own data set was
extended.
Description of Standard scores was added.
Lower panel was updated.
Rasch model was added into IRT models section.
Pearson correlation coefficient of factor scores and Z-scores were
added for IRT models
Reference list was expanded.
Bug in multinomial regression for scored data was fixed.
Bug in DDF for datasets withou DIF items was fixed.
Selected code was updated.
ShinyItemAnalysis 1.0.0
Major updates
New graphical representation via ggplot2 package
Cronbach’s alpha was added
Distractor analysis was extended
More DIF detection methods were added Mantel-Haenszel test, Logistic
regression, Lord’s and Raju’s statistic for IRT models all are now used
via difR package
Delta plots were extended: fixed and normal threshold are now
allowed
Multiple comparison correction methods were added into DIF detection
procedures
More examples of datasets were added from difNLR
package
References were added
New functions were added into the package: - DDplot()
function for graphical representation of difficulties and
discriminations. - DistractorAnalysis() function and its
graphical representation plotDistractorAnalysis(). -
plotDIFirt() and plotDIFLogistic() functions
for plotting characteristic curves based on IRT models and based on
logistic regression.