Change log
All major and minor updates, changes and bug fixes are listed here starting with version 2.0. To take full advantage of the features in jMetrik, be sure you are using the most current version. Starting with version 2.0.1, jMetrik will automatically check for updates on startup. If you find a bug, please send an email to support@itemanalysis.com.
Date |
Version |
Description |
Status |
| April 12, 2013 | 3.0.1 | Changes to installer and minor bug fixes. -DIF analysis now recognizes numbers for group codes -Prevent user from deleting active data set -Robust z recognizes Rasch model items |
Done |
| April 8, 2013 | 3.0.0 | Major rebuild of jMetrik. It includes new database features, methods of anlaysis, and revisions to the interface. | Done |
| TBA | 2.1.1 | Refinement: Completely separated psychometrics library from jMetrik library and made pscyhometrics library available online. | |
| Refinement: Added Likelihood cross-validation bandwidth computation to kernel class | |||
| Refinement: Added Least-squares cross-validation bandwidth computation to kernel class | |||
| Bug fix: Nonparamtric OCC DIF analysis not running from syntax. | |||
| Bug fix: Textbox sizes in nonparametric occ dialog (not displaying properly on Mac OSX | |||
| Bug fix: DIF analysis by nonparametric curves not running from syntax due to a misspelled command. | Fixed | ||
| August 7, 2011 | 2.1.0 | New Feature: Item response theory plots | Added |
| New Feature: Added option to data import that allows user to specify the number of rows of data that are scanned to determine data type. | Added | ||
| Refinement: jMetrik command syntax simplified and now allows for arguments with spaces. | Added | ||
| Refinement: New variance estimator for the standardized mean difference statistic in the Mantel-Haenszel DIF analysis. CMH DIF dialog box updated accordingly. | Added | ||
| Refinement: Import/export modified to handle quoted text. | Added | ||
| Refinement: Import/export dialogs improved | Added | ||
| Refinement: Scoring and grouping commands changed to be more readable. | Added | ||
| Refinement: Adjusted variance in Rasch scale quality statistics is now constrained to only provide nonnegative variance estimates. This change prevents NaNs from being displayed for adjusted variance, separation, and reliability. | Added | ||
| Bug Fix: The option to save person estimates in a Rasch analysis produced an error because the analysis attempted to update the GUI from outside the EDT. This bug was not related to any calculation. It only affected the performance of the interface. Bug corrected by making the call to the GUI update within the EDT. | Fixed | ||
| Bug fix: In IRT equating, transformed item parameter variables and person parameter variable would add a "t" to the end of the original variable name. If the original name exceeded 10 characters this "t" would be trimmed off resulting in a nonunique item name. A database error would result. Corrected by adding the "t" to the beginning of the original variable name. | Fixed | ||
| Bug fix: An error would occur when users selected the save item parameters option in a Rasch analysis but did not provide a name for the table. Users now prompted for input if name of item output table is omitted. | Fixed | ||
| Bug Fix: A "Null Pointer Exception" was thrown when using the "Item Deleted Reliability" option when you have item groups specified. This occurred because the program attempted to do an item deleted reliability analysis for the part-test reliability estimates when no such functionality existed for the part-test reliability estimates. | Fixed | ||
| Bug fix: If a user deleted a workspace outside of jMetrik or used a workspace located on a portable hard drive that is no longer connected, Jmetrik would freeze on startup if that workspace was the last workspace. jMetrik will now load the DefaultWorkspace if a workspace cannot be found. If the DefaultWorkspace does not exist, it will be created. | Fixed | ||
| April 23, 2011 | 2.0.1 | New feature: jMetrik automatically checks for updates on startup | Added |
| Bug fix: Open and save dialogs would not remember last location. | Fixed | ||
| Bug fix: DIF analysis frequency tables not displaying. | Fixed | ||
| Bug fix: Rasch item start values setting all start values to last item in database. | Fixed | ||
| Bug fix: Running Rasch analysis from syntax with the option of saving item parameter values would save the UCON bias corrected values in the database. This behavior was due to the default options in the Rasch analysis command. Fixed by changing command defaults. | Fixed | ||
| Bug fix: Item names not displaying on nonparametric curves graphs. | Fixed | ||
| Bug fix: x-axis option for normal scores not working for nonparametric curves | Fixed | ||
| Bug fix: Item names not displaying on DIF nonparametric curves graphs. | Fixed | ||
| Bug fix: x-axis option for normal scores not working for DIF nonparametric curves | Fixed | ||
| April 5, 2011 | 2.0.0 | Major revision to jMetrik. New features include test scaling, ranking, item response theory (IRT), and IRT equating. jMetrik now uses a new syntax/command system. Database functioning improved for better performance and reliability. Graphs changed. Memory management improved. | |