        ***************************************************************
        *                                                             *
        *  Changes and Developments in the ShinyItemAnalysis Package  *
        *                                                             *
        ***************************************************************
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- Changes in ShinyItemAnalysis 1.2.6 (2018-03-01) -
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MAJOR UPDATES

  o UI for DIF/Fairness section was updated.
  o References were added into About page.
  o New design of reports is now available. Design of PDF reports was
    updated.
  o Wording in report was improved.
  o DIF/Fairness section in report was improved.
  o New hexbin for ShinyItemAnalysis was created and added into reports.
  o Sample code in DIF/Fairness IRT Lord and IRT Raju was extended to
    1PL, 2PL and 3PL models.
  o 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

  o Reference list was updated.
  o CITATION file was modified.
  o In Summary page the description for summary table was added. The sample
    code was updated.
  o Wording in summary statistics in Summary section was improved.
  o Description of Session info section in reports was added.


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- Changes in ShinyItemAnalysis 1.2.5 (2017-11-14) -
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MAJOR UPDATES

  o Correlation plots now offer reordering by hierarchical clustering.
    Several linkage methods are offered. This is also included in reports.
  o Confirmation of data upload was added. Also warnings and errors are
    displayed in case that something went wrong when uploading.
  o 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.
  o In multinomial regression bug when only two choices in data are present
    was fixed.

MINOR UPDATES

  o Link for Adela's website was added.
  o Columns for BIC and its adjusted version were swapped in table for
    IRT models comparison. Text above table was also updated.
  o In IRT section dpi of downloaded plots was set to 300.
  o In IRT training downloaded plots also include legend with parameters.
  o In all IRT models table with parameters includes all parameters
    a, b, c, d.
  o In IRT training equations were moved above interpretation.


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- Changes in ShinyItemAnalysis 1.2.4 (2017-08-28) -
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MINOR UPDATES

  o Reports were mildly updated.
  o Resolution of figures in reports was increased (now 300ppi)
  o Dependencies were updated.
  o Some typos fixed.
  o Legends of plots were unified and placed in better way for
      - 'NLR IRT Z'
      - 'DDF'
      - function 'plotDIFlogistic()'
  o Bug in item names for 'DDF' subsection of 'Fairness/DIF' section
    was fixed.

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- Changes in ShinyItemAnalysis 1.2.3 (2017-08-22) -
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*** THIS IS A CRAN VERSION ***

MAJOR UPDATES

  o Report's customized options were extended. Reports now include also
    dynamic description.
  o Author and dataset name can be now filled and add into reports.
  o Dataset 'difMedical' was renamed to 'MSAT-B' according to 'difNLR'
    package. Its description was mildly updated.
  o Purification options were added into 'Nonlinear IRT Z' and 'DDF' subsections
    of 'DIF/Fairness' sections.
  o Purification options was added 'DDF' analysis in 'Reports' section when customized
    setting is selected.


MINOR UPDATES

  o Size of plots and font in plots was changed for reports.
  o Plots in HTML report are now centered.
  o Wording of reports' default option was updated.
  o References were updated in 'Reference' section and also in README file.
  o Wording of Spearman test in 'Validity' section was mildly updated.

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- Changes in ShinyItemAnalysis 1.2.2 (2017-07-26) -
---------------------------------------------------

MAJOR UPDATES

  o Design of reports was edited.
  o 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.
  o ShinyItemAnalysis now uses 'plotly' package!

MINOR UPDATES

  o Design and options of 'Report' page were updated.
  o Layout of IRT curves training page was mildly changed. There are now
    two curves in each plot. Also text area input was added and synchro-
    nized with sliders. Colour of sliders now correspond to colour of
    curve.


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- Changes in ShinyItemAnalysis 1.2.1 (2017-07-16) -
---------------------------------------------------

MAJOR UPDATES

  o Several bugs were fixed:
     - Interpretation of regression models was fixed.
     - Interpretation of text about correlation in Predictive validity
       was fixed.
  o ShinyItemAnalysis now used also 'data.table' package.
  o Data page was divided into two subpages to avoid long rendering
    of tables.
    when changing datasets.
  o Function 'gDiscrim' to calculate generalized discrimination was
    implemented.
  o Function 'DDplot' was edited to be able to handle generalized
    discrimination.
    Double slider was added into 'Traditional analysis page'.
  o Traditional analysis table was extended by adding column
    with generalized
    discrimination. This is done also in reports.
  o 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

  o Last three rows in regression comparison table are now bold.
  o Reference list was extended.
  o The subpage 'Distractors' of 'Item analysis' page was mildly edited.
  o Generalized DD plot was removed from 'Distractor' subpage. It is now
    available on 'Traditional item analysis' subpage.
  o Item patterns frequency plot is now made with 'ggplot2' package.
  o 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


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- Changes in ShinyItemAnalysis 1.2.0 (2017-06-15) -
---------------------------------------------------

*** THIS IS A CRAN VERSION ***

MAJOR UPDATES

  o ShinyItemAnalysis can now handle missing values. Newly there is
    an option to handle NA values as zeros in scored data.
  o Bug in WrightMap was fixed.
  o We have new contributor - Lubomir Stepanek!
  o New online mirrors were added.
  o Busy indicator and tooltips were added.
  o Structure of application was mildy updated.
  o Datasets 'dataMedical()', 'dataMedicalkey()', 'dataMedicaltest()'
    were updated. Group variable and criterion variable were added.
  o 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
    o 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.
    o Default option of p-values adjustments in DIF detection methods
      was set to 'none'.
    o Bugs in DIF Logistic IRT Z and DIF Nonlinear IRT Z tables of parameters
      were fixed.
  * IRT models
    o IRT models are now fitted only by mirt package.
    o Training plots of item characteristic and information curves were
      added into IRT models section.
    o Pearson's correlation coefficient between factor scores and
      standardized total score was added for Bock's nominal IRT model.
  * Reports
    o New options for reports were added. By default no IRT models and
      no graphs of correlation structure are fitted.
    o Reports are now described in detail.
    o The settings of reports are now also offered in Report section.
    o Generation of reports is now done part by part. Once it is finished,
      the download button is offered.
    o Message boxs with warning for generation and download of reports
      were added.
  * Validity analysis:
    o Validity analysis of predictive outcome is now included on Validity
      page in Predictive validity section.
    o Now it is possible to upload predictive outcome.
    o Dataset 'GMAT' and 'GMATtest' from 'difNLR' package include now criterion
      variable which can be used in Predictive validity section.
    o Functions 'DistractorAnalysis()' and 'plotDistractorAnalysis()' were
      extended by 'matching' argument.
  * Item analysis
    o Barplot of answer selection proportion was added into Distractor
      subsection.
    o Diagram of custom discrimination - new version of DD plot - was
      added into Distractor subsection.

MINOR UPDATES

  o CITATION file was added.
  o Maximum upload size was set to 30MB.
  o Item names were fixed and unified.
  o Some typos were fixed.
  o Readme file was updated.
  o Reports design was slightly updated.
  o Code was slightly updated to correspond to new versions of packages
    difNLR, mirt and ggplot2.
  o Selected code was updated.
  o Package dependencies were updated (packages 'knitr' and 'xtable' are
    now used in report generation).
  o Minor bug in DIF IRT (Lord and Raju) plots and downloads was fixed.
  o Designs of footer and navigation bar were updated.
  o The version for small media was designed.
  o Weblink for version 1.1.0 was created.
  o Reference list was expanded and links to online versions of articles
    were added.

---------------------------------------------------
- Changes in ShinyItemAnalysis 1.1.0 (2016-02-02) -
---------------------------------------------------

*** THIS IS A CRAN VERSION ***

MAJOR UPDATES

  o  New overall appearence using shinythemes package.
  o  New datasets 'dataMedical()', 'dataMedicalkey()', 'dataMedicaltest()'
     were added into the package.
  o  New dataset is offered in example datasets inside the shiny app.
  o  Bug in Distractor plots for uploaded data was fixed.
  o  Calculation of Success Rate in Standard Scores was fixed.
  o  Differential Distractor Functioning detection method was added.
  o  Syntax of difNLR functions was edited to response to new version of
     package.
  o  Function plotDIFirt() was updated.
  o  Correlation structure section was added including correlation plot
     and scree plot.
  o  Pages structure was changed and updated.
  o  IRT models are now fitted by mirt package.
  o  Subsection IRT model selection was added into IRT models section.
  o  Wrigh maps were added for Rasch and 1PL IRT model.
  o  Bug in data upload was fixed.
  o  Subsection regression model selection was added into Regression
     section.


MINOR UPDATES

  o  Typos were fixed.
  o  Selected R code was updated.
  o  Description of data including uploading own data set was extended.
  o  Description of Standard scores was added.
  o  Lower panel was updated.
  o  Rasch model was added into IRT models section.
  o  Pearson correlation coefficient of factor scores and Z-scores were
     added for IRT models
  o  Reference list was expanded.
  o  Bug in multinomial regression for scored data was fixed.
  o  Bug in DDF for datasets withou DIF items was fixed.
  o  Selected code was updated.

---------------------------------------------------
- Changes in ShinyItemAnalysis 1.0.0 (2016-11-25) -
---------------------------------------------------

*** THIS IS A CRAN VERSION ***

UPDATES

  o  New graphical representation via ggplot2 package
  o  Cronbach's alpha was added
  o  Distractor analysis was extended
  o  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
  o  Delta plots were extended:
     fixed and normal threshold are now allowed
  o  Multiple comparison correction methods were added
     into DIF detection procedures
  o  More examples of datasets were added
     from difNLR package
  o  References were added
  o  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.

