Winsteps bugs, bug-fixes, changes and enhancements

Winsteps Rasch software: update history

Windows: Winsteps runs successfully under Windows 10, 8, 7, Vista, XP, (but not Windows 2000, ME, NT, 98, 95, 3.1) also runs under Fusion, Soft-PC, Virtual PC and Wine on the Mac, and Mandrake Linux 10.0 via CrossOver Office 3.1.
Hardware: Winsteps requires an Intel Pentium 4 (released in 2000) or later.

For trouble-shooting when installing Winsteps, see problems.htm.

Update procedure: When an update is released, all license holders are notified by email. For those eligible for free updates (within one year of original purchase or two years of renewal), the email contains an update download URL and an installation password. All licensees receive at least one free update. To request updates, report bugs, and make suggestions, please use the Comments form "Write here:" at the bottom of this webpage.

Winsteps 3.92.1, February 5, 2016, squashes minor bugs in 3.92.0
  • "WARNING: DUPLICATE MEMORY ASSIGNMENT" - annoying inconsequential message removed.
  • Graph window - can be moved and resized
  • Table 23 - person measure correlations: usually very small correction

    Bugs in 3.92.1
  • Table 23.6 - occasional unreasonably large standard errors for the PCA-based person estimates, causing unreasonably high disattenuated correlations. Work-around: Please contact Winsteps.com if this is a problem for you.
Winsteps 3.92.0 (replaces 3.91.2), February 1, 2016
  • ANCESTIM=Yes may give improved IAFILE=/PAFILE= item/person anchoring compared with standard Winsteps estimation, when there are few person/item anchors in a large or sparse dataset.
     
    Unanchored estimation is unchanged since Winsteps 3.75
    ---------------------------------------------------------------------------------------------------
    |ENTRY   TOTAL  TOTAL           MODEL|   INFIT  |  OUTFIT  |PTMEASUR-AL|EXACT MATCH|              |
    |NUMBER  SCORE  COUNT  MEASURE  S.E. |MNSQ  ZSTD|MNSQ  ZSTD|CORR.  EXP.| OBS%  EXP%| TAP          |
    |------------------------------------+----------+----------+-----------+-----------+--------------|
    |     3     35     35   -6.59    1.85| MINIMUM MEASURE     |  .00   .00|100.0 100.0| 1-2-4        |
    |     4     32     35   -4.40     .81| .90    .0| .35   -.2|  .55   .53| 94.1  94.0| 1-3-4        |
    |     5     31     35   -3.83     .70|1.04    .2| .52    .1|  .55   .55| 88.2  91.7| 2-1-4        |

     
    With anchoring: IAFILE=* 4,10 * and ANCESTIM=No (the default), estimates are unchanged since Winsteps 3.75
    ------------------------------------------------------------------------------------------------------------
    |ENTRY   TOTAL  TOTAL           MODEL|   INFIT  |  OUTFIT  |PTMEASUR-AL|EXACT MATCH|        |              |
    |NUMBER  SCORE  COUNT  MEASURE  S.E. |MNSQ  ZSTD|MNSQ  ZSTD|CORR.  EXP.| OBS%  EXP%|DISPLACE| TAP          |
    |------------------------------------+----------+----------+-----------+-----------+--------+--------------|
    |     3     35     35    7.62    1.85| MINIMUM MEASURE     |  .00   .00|100.0 100.0|    -.02| 1-2-4        |
    |     4     32     35   10.00A    .77| .81   -.3| .30   -.2|  .55   .53| 97.1  93.2|    -.24| 1-3-4        |
    |     5     31     35   10.37     .70|1.04    .2| .52    .1|  .55   .55| 88.2  91.7|    -.02| 2-1-4        |

     
    With anchoring: IAFILE=* 4,10 * and ANCESTIM=Yes may give better estimates. Notice that the DISPLACEments are smaller.
    ------------------------------------------------------------------------------------------------------------
    |ENTRY   TOTAL  TOTAL           MODEL|   INFIT  |  OUTFIT  |PTMEASUR-AL|EXACT MATCH|        |              |
    |NUMBER  SCORE  COUNT  MEASURE  S.E. |MNSQ  ZSTD|MNSQ  ZSTD|CORR.  EXP.| OBS%  EXP%|DISPLACE| TAP          |
    |------------------------------------+----------+----------+-----------+-----------+--------+--------------|
    |     3     35     35    7.81    1.85| MINIMUM MEASURE     |  .00   .00|100.0 100.0|    -.03| 1-2-4        |
    |     4     32     35   10.00A    .82| .91    .0| .34   -.2|  .55   .53| 94.1  94.0|    -.03| 1-3-4        |
    |     5     31     35   10.58     .71|1.05    .3| .52    .1|  .55   .56| 88.2  91.8|    -.03| 2-1-4        |

     
  • Table 0: Convergence tables. Values for PROX iterations more accurately reported, but not changed.
  • Table 14.3 and similar, categories labeling with CFILE= corrected.
  • Table 26.1, etc.: mean and S.D. of displacements is reported.
  • Table 29: Empirical Code Frequencies. Dotted probability curves corrected when categories do not start at 0.
  • Tables 30, 31: Welch t-statistics. Usually small corrections to the d.f., t-statistics and probabilities.
  • Tables 30, 31, 33: estimation iterations always stop and better DIF/DPF/DGF measure estimates for classes with extreme scores
  • MPROX=0: no PROX starting values. Starting values for JMLE/UCON are 0.00 logits
  • SIFILE= data simulation. "Warning: no memory array slots available. Ref. 19" corrected.
  • Edit menu, Initial settings (user preferences), occasional failure to save is corrected.
Winsteps 3.92.0 known bugs or deficiencies
  • Windows 10: installation may hang before completion. The reason is not yet known.
    work-around: Winsteps is correctly installed. Please go to your c:\Winsteps. Right-click on Winsteps.exe to create a short-cut.
  • Importing STATA .dta files: "string length problem". Winsteps does not support STATA 14 or later .dta files
    work-around: To read a STATA 14 or later file with Winsteps, first in STATA,
    . saveold filename13, version(13)
    Then filename13.dta can be processed by Winsteps.
  • Winsteps-generated Excel spreadsheets: Excel 2010 may plot incorrectly when it interprets person and item labels that look like numbers as numbers
    work-around: Please make the person labels definitely non-numeric by including a non-numeric character in the labels, such as _ (underline)
  • Dual monitors. Winsteps graph window displays on primary monitor after being dragged to secondary monitor.
Known bugs in Winsteps 3.91.2: please revert to 3.91.0
  • PAFILE= IAFILE=: failure to converge and obvious mis-estimation. The bug-fix in 3.91.2 has caused new problems.
    work-around: please revert to any earlier version of Winsteps
  • DIF sizes and standard errors: obviously excessively large.
    work-around: please revert to any earlier version of Winsteps
  • Enhancements in 3.91.2 are shown under 3.92.0
Winsteps 3.91.0 - September 22, 2015Description
 
---------------------------------------------------------------------------------------------------
|ENTRY   TOTAL  TOTAL           MODEL|   INFIT  |  OUTFIT  |PTMEASUR-AL|EXACT MATCH|              |
|NUMBER  SCORE  COUNT  MEASURE  S.E. |MNSQ  ZSTD|MNSQ  ZSTD|CORR.  EXP.| OBS%  EXP%| TAP          |
|------------------------------------+----------+----------+-----------+-----------+--------------|
|     3     35     35   -6.59    1.85| MINIMUM MEASURE     |  .00   .00|100.0 100.0| 1-2-4        |
|     4     32     35   -4.40     .81| .90    .0| .35   -.2|  .55   .53| 94.1  94.0| 1-3-4        |
|     5     31     35   -3.83     .70|1.04    .2| .52    .1|  .55   .55| 88.2  91.7| 2-1-4        |

 
With anchoring: IAFILE=* 4,10 *  
------------------------------------------------------------------------------------------------------------
|ENTRY   TOTAL  TOTAL           MODEL|   INFIT  |  OUTFIT  |PTMEASUR-AL|EXACT MATCH|        |              |
|NUMBER  SCORE  COUNT  MEASURE  S.E. |MNSQ  ZSTD|MNSQ  ZSTD|CORR.  EXP.| OBS%  EXP%|DISPLACE| TAP          |
|------------------------------------+----------+----------+-----------+-----------+--------+--------------|
|     3     35     35    7.62    1.85| MINIMUM MEASURE     |  .00   .00|100.0 100.0|    -.02| 1-2-4        |
|     4     32     35   10.00A    .77| .81   -.3| .30   -.2|  .55   .53| 97.1  93.2|    -.24| 1-3-4        |
|     5     31     35   10.37     .70|1.04    .2| .52    .1|  .55   .55| 88.2  91.7|    -.02| 2-1-4        |

Bugs fixed and other tweaks
. Tables 30, 31, 33, Differential Item Functioning DIF, Differential Person Functioning DPF, Differential Group Functioning DGF DIF/DPF/DGF Measures and Contrasts were incorrect due to estimation process stopping too soon. Corrected.
. Tables 1, 12, 16. Wright person-item maps. IMAP= and PMAP= IMAP= and PMAP= were not fully functional. Corrected.
. Tables 12.5, 12.6, 12.7 Wright Maps for persons Tables 12.5, 12.6, 12.7 omit items that are on continuation lines in Table 12.8. Corrected in 3.90.2.
.Graphs menu, graphs window, flipped curves. When cumulative probability curves were flipped, the legends did not match the curves. Corrected.
.IDFILE=, PDFILE= item deletion file, person deletion file Errors corrected in 3.90.1 include:
Error messages for IDFILE= or PDFILE= incorrectly report errors for IDELETE= or PDELETE=
IDFILE= * 5 10 60 87 88 111 118 (all on one line) causes "Winsteps has stopped working".
. IDFILE= etc., Winsteps-generated Excel spreadsheets unwanted quotemarks around contents of worksheet cells, for example, "Measure". Corrected in 3.90.1
"Excel-related error in WINEXCEL 3.90.0 at nsavefile 2130: 1004 The file could not be accessed." Corrected error message in 3.90.2.
. Plots menu, Excel Scatterplot "Excel-related error in Winexcel 3.90.0 at scatterse 11520:1004". Corrected in 3.90.3.
. Table 23, Excel Cluster Plot Excel 2010 compatibility: person label moved to last column of data in Excel worksheet
. Silent Install instructions. Instructions for silent install of Winsteps corrected in Winsteps Help

Winsteps 3.90.0 - April 28, 2015Description
 
---------------------------------------------------------------------------------------------------
|ENTRY   TOTAL  TOTAL           MODEL|   INFIT  |  OUTFIT  |PTMEASUR-AL|EXACT MATCH|              |
|NUMBER  SCORE  COUNT  MEASURE  S.E. |MNSQ  ZSTD|MNSQ  ZSTD|CORR.  EXP.| OBS%  EXP%| TAP          |
|------------------------------------+----------+----------+-----------+-----------+--------------|
|     3     35     35   -6.59    1.85| MINIMUM MEASURE     |  .00   .00|100.0 100.0| 1-2-4        |
|     4     32     35   -4.40     .81| .90    .0| .35   -.2|  .55   .53| 94.1  94.0| 1-3-4        |
|     5     31     35   -3.83     .70|1.04    .2| .52    .1|  .55   .55| 88.2  91.7| 2-1-4        |

. Winsteps graph menu: "Winsteps graphing failed at WINVBEXE 3.90.0 7986: 9 Subscript out of range" Work-around: Winsteps 3.90 is not probably installed. Please delete Winsteps.exe and reinstall Winsteps 3.90.
New in this version
. Table 1.8, 12.8 item-person Wright map Each item is shown at all the locations on the latent variable corresponding to all raw scores on the item.
Tables 1.8, 12.8 match Table 2.2.
. Table 23.6 person measure scatterplot Excel scatterplots of person measures for 3 item clusters in Contrast 1, reported in Table 23.6
. Table 44 global statistics Global statistics (previously in Table 3.1) moved to their own table.
Log-likelihood chi-squared statistic has degrees of freedom estimated by data simulation
. Winsteps User Manual PDF This PDF of 700+ pages is now a separate free download so that the Winsteps-installation download-size is reduced by 40%.
Improvements
. Table 3.1 summary statistics
  • Population Standard Deviation, P.SD, and Sample Standard Deviation, S.SD, reported
  • The Classical Test Theory (average) Standard Error of Measurement, SEM, is shown with Cronbach Alpha = Person raw score sample standard deviation * √(1 - Cronbach Alpha Reliability)
  • Valid Responses/Missing Responses % - see Table 44.
  • . Table 20.1 score table
  • Maximum possible number of statistically-different levels of performance on the test/instrument are shown
  • UIMEAN= and USCALE= conversion values display with (UDECIMALS= + 2) decimal places
  • . DISFILE= distractor file Distractor/option file include standard deviation of person measures and the Infit Mean-Squares
    Bugs fixed and other tweaks
    . Table 0.4, 6.1, 10.1, etc. subset reports Misleading report of subsets for anchored items corrected.
    . Table 1, 12, 16, item-person Wright maps
  • MORE= LESS= RARE= FREQ= corrected for some subtables
  • Left-align labels so that labels with leading blanks are displayed
  • 1.0: Some persons with extreme scores were omitted, now displayed
  • 1.5, 12.5: Person-Item Wright map with expected score zones: slightly corrected vertical placement.
  • 12.5, 12.6, 12.7: Prevent malfunction due to internal storage overwrite
  • . Tables 6.1, 10.1, 13.1, 17.1, etc., item and person measure tables
  • "ERROR" replaced by "S.E."
  • 6.1, 17.1, etc. Person point-correlations only reported when meaningful: (i) all items dichotomies, (ii) all items in the same ISGROUP= group, (iii) all items have three categories, which can be in different ISGROUPS= groups.
  • 14.1, 18.1: Measure shown for anchored item/person/item even when dropped from the analysis
  • 14.1, 18.1: Total score and total count shown for dropped item/person
  • 14.1, 18.1: Person/item status codes changed to include reasons they were omitted from the analysis
  • . Table 7.1, 11.1, person/item response listing With T7OPTIONS=E: E = expected value = observed item score - residual, not recounted item score - residual
    . Table 10.3, 13.3, etc., item option/distractor reports For each item option/distractor the standard deviation of the person measures and the Infit Mean-Square are also shown
    . Table 23, 24 dimensionality analysis (PCA of residuals)
  • Eigenvalues (contrast sizes) displayed with 4 decimal places
  • When subtest reliability is zero, disattenuated correlation is reported as "undefined"
  • . Table 27.1, 27.3, 28.1, 28.3 item/person subtotal reports
  • Population and Sample Standard Deviations reported, P.SD and S.SD
  • Fixed-effects chi-squared is "inestimable" when some counts are too small or some variances are zero
  • . Table 30.4, 31.4 DIF/DPF reports
  • All DIF/DPF classes reported, including those with extreme subscores
  • Summary DIF chi-squared: decimal points aligned
  • skips omitted items
  • . Table 32 control specifications Winsteps version number added to variable list
    . BATCH= batch mode No screen-flashing in Winsteps batch mode
    . DELIMITER=, SEPARATOR= tab-separated data file Correct parsing of tab-separated input data files with DELIMITER=TAB and DELIMITER=";"
    . IDFILE=, PDFILE=, IDELQU=, PDELQU= deletion command deleted items/persons can be listed in lines with the same format as IDELETE=
    . IFILE=, PFILE= item/person measure files
  • Measure shown for anchored item/person/item even when dropped from the analysis
  • Total score and total count shown for dropped item/person
  • Person/item status codes changed to include reasons they were omitted from the analysis
  • IFILE=: correct output fields with ASYMPTOTE=YES
  • . IPMATRIX= dialog box Data matrix can be any of fields in XFILE=
    . ISELECT=, PSELECT=, IDELETE=, PDELETE= In Specification menu dialog box, ISELECT= resets temporary item selection, similarly PSELECT=, IDELETE=, PDELETE=
    . ISFILE= item-structure file Item labels included
    . ISGROUPS= ISUBTOTAL= ISRANGE= Remove conflicts when two or three of these commands are used in the same analysis
    . LOGFILE= accumulated control files Prevent malfunction due to reusing device name already in use.
    . SAFILE= structure (Andrich Threshold) anchor file Warning message to screen for polytomies when IAFILE= item-anchor file specified without SAFILE=
    . SIFILE= Output Files menu: simulation dialog box "Avoid extreme scores" option now functional
    . XFILE= response file Most Probable Response for a deleted item set to -1
    . Graphs menu: Graphs window
  • Graphs window does not hide the Windows task bar
  • Option curves display correctly with Absolute scaling
  • Probability curves, Empirical curves and Option curves display same color sequence
  • . Output Files menu: Output File Formats Output files are opened using the program specified by the Windows filetype for the output file suffix
    . Plots menu: Excel plotting
  • Scatterplot worksheet: corrected disattenuated correlation computation: added missing SQRT(...)
  • Scatterplot worksheet: corrected computation of t-tests in column Q
  • Prevent "Type mismatch" failure in some versions of Excel
  • Winsteps-Excel Interface version number shown in error box
  • Prevent Excel failure due to work-file deletion when Winsteps is closed before the Excel plot displays
  • . Winsteps Analysis window When launched, make this temporarily the top window with normal size

    Known Bugs in Winsteps 3.81.0

    If squashing one of these bugs is vital to your analysis, please tell us using the "Write here:" form below. There may be a hot-fix.

    1. BATCH=YES with .sav output file can fail with "SPSS Interface: Input work file incorrect"
      Work-around: remove BATCH=Y from the batch file. Insert BATCH=YES into the control files. The Winsteps analysis screens will display and then disappear, but Winsteps-batch-mode functions correctly.
    2. CFILE= can display incorrect labels in Table 3.2 and PCURVE= curves.
      Work-around: use CLFILE=
    3. DATA= must point to a correctly-formatted text file, but Winsteps does not verify this, so processes other file formats with strange results.
      Work-around: please look at the Winsteps Analysis window. Does the first line of the data look correct? It is shown on the line below "Input Data Record". If not, reformat the data file as a text file.
    4. DELIMITER=TAB, input data files with tabs: format incorrectly.
      Work-around: 1) FORMAT= with 1X for tabs. Example: FORMAT=(8A,10(1X,A)) NAME1=1 NAMLEN=8 ITEM1=9 NI=10
      2) Paste the data into Excel. Leave the first row blank or paste in the item labels. Save the Excel file. Use the Winsteps Excel/RSST menu to create a Winsteps control and data file. Paste your item labels, etc., into that control file.
    5. IFILE=. When ASYMPTOTE=YES, the IFILE= output column headings can be wrong.
      Work-around: in Field Selection, set ASYMPTOTE=NO, or set only ASYMPTOTE=YES
    6. ISELECT= and PSELECT= do not reset in the Specification menu dialog box.
      Work-around: for different ISELECT= and PSELECT=, rerun the analysis.
    7. OFILE= can malfunction.
      Work-around: copy-and-paste output into a new file.
    8. PTBISERIAL=All, PTBISERIAL=Yes: Table 14.3 and similar, DISFILE=, unscored missing data distorts the computation of distractor/option correlations.
      Work-around: use correlations from PTBISERIAL=M.
    9. PTBISERIAL=X (PTMX), point-measure correlation excluding current observation: incorrect computation.
        Work-around for one item at a time:
      1. From an analysis of all the items, output IFILE=if.txt, SFILE=sf.txt
      2. In a new analysis, IAFILE=if.txt, SAFILE=sf.txt, IWEIGHT=0 for the target item. PTBISERIAL=M.
      3. PTMA in the new analysis for the target item is its PTMX
    10. UPMEAN=, UIMEAN= can compute incorrectly with weighting.
      Work-around: notice the incorrect value in Table 3.1, then set UPMEAN= or UIMEAN= to - incorrect value.
    11. Tables 1, 12, 16: FREQ=, MORE=, LESS=, RARE= ignored for some subtables.
      Work-around: edit the output tables.
    12. Table 1.3, 1.13, 16.3, 16.13 persons with extreme scores may not be shown.
      Work-around: edit in missing persons by looking at other subtables.
    13. Table 12.5, 12.6, 12.7 Winsteps failure when there are long item names and many polytomous categories.
      Work-around: use the Specification menu box to enter IMAP=1W10 to shorten the item label before Table 12. Then IMAP= afterwards.
    14. Table 12.12, the item easiness distribution is incorrect.
        Work-around:
      1. Output Table 12:12. Copy into Microsoft Word with Courier font
      2. Specification menu box
        USCALE=-1
        OK
      3. Output Table 12.2. . Copy into Microsoft Word with Courier font
      4. Rectangular copy (alt+mouse) the item distribution from Table 12.2 into Table 12.12.
    15. Table 27.1, 28.1, Fixed-Effects Chi-Square: incorrect computation.
      Work-around: see www.rasch.org/rmt/rmt62b.htm
    16. Table 30.4 and similar: chi-square computation incorrect when a class has extreme scores.
      Work-around: compute by hand, see Help for Table 30.4
    17. Graph window: failure: Winsteps Graphing failed at WINVBEXE 3.81.0 Wingraph 22470:9 Subscript out of range.
      Work-around: Winsteps is incorrectly installed. Please reboot your computer and reinstall Winsteps.
    18. Graph window: Empirical Option curves, Absolute scaling: incorrectly displayed
      Work-around: use the Empirical category curves, or construct the curves from XFILE=
    19. Graph window: window is behind Windows task bar
      Work-around: move the Windows task bar. Right-click on it. Uncheck "Lock". Drag task bar to a different side of the screen.
    20. Plots menu: Compare Statistics scatterplot: disattenuated correlation incorrect computation.
      Work-around: in Excel Worksheet, add the SQRT, Example:
      =MIN(1,CORREL($B$3:$B$22,$D$3:$D$22)* SQRT( (VAR($B$3:$B$22)*VAR($D$3:$D$22)/(( VAR($B$3:$B$22) - SUMSQ($C$3:$C$22)/COUNT($C$3:$C$22))*(VAR($D$3:$D$22) - SUMSQ($E$3:$E$22)/COUNT($E$3:$E$22))))) )

    Winsteps 3.81.0
    February, 2014
    Description
     
    ---------------------------------------------------------------------------------------------------
    |ENTRY   TOTAL  TOTAL           MODEL|   INFIT  |  OUTFIT  |PTMEASURE-A|EXACT MATCH|              |
    |NUMBER  SCORE  COUNT  MEASURE  S.E. |MNSQ  ZSTD|MNSQ  ZSTD|CORR.  EXP.| OBS%  EXP%| TAP          |
    |------------------------------------+----------+----------+-----------+-----------+--------------|
    |     3     35     35   -6.59    1.85| MINIMUM MEASURE     |  .00   .00|100.0 100.0| 1-2-4        |
    |     4     32     35   -4.40     .81| .90    .0| .35   -.2|  .55   .53| 94.1  94.0| 1-3-4        |
    |     5     31     35   -3.83     .70|1.04    .2| .52    .1|  .55   .55| 88.2  91.7| 2-1-4        |

    Bugs fixed from previous versions
    . Table 3.1 Log-likelihood chi-square has range of degrees of freedom and probabilities due to ambiguity computing exact d.f.
    was: with 429 d.f. p=1.0000
    now: with d.f. in the range 429 to 476, prob.=.9845 to prob.=1.0000
    . Table 3.2, etc. Counts of Missing observations now include those in extreme scores
    . Table 6.1, 10.1, etc. Correct assignment of column headings, "RMSR" and "WEIGH" to the column contents.
    . Table 6.1, 10.1, etc., Analysis window Correction of subset detection and reporting when some items or persons are anchored.
    . Table 12 Corrected memory allocation error that causes occasional program crash.
    . Table 23.1, etc. Right-align correlations in the correlation table.
    . Table 30, 31, 33: DIF/DPF/DGF plots Prevent truncation of numbers that caused misleading plots when UDECIMALS=0
    . Table 30.4, 31.4 Corrected computation for the Between-Class DIF Unweighted Mean-Square
    ----------------------------------------------------------------------------------
    | KID        SUMMARY DIF               BETWEEN-CLASS       TAP                   |
    | CLASSES    CHI-SQUARE   D.F.  PROB.  UNWTD MNSQ  t=ZSTD  Number Name           |
    |--------------------------------------------------------------------------------|
    |       2         .6673      1  .4140       .7038   .2370       6 3-4-1          |
    |       2         .0021      1  .9636       .0022 -1.3759       7 1-4-3-2        |
    |       2        1.9350      1  .1642      2.1008  1.0670      13 1-4-3-2-4      |
    |       0         .0000      0 1.0000       .0000   .0000      18 4-1-3-4-2-1-4  |
    ----------------------------------------------------------------------------------
    . IFILE=, PFILE=, item and person files Corrected COUNTs for DROPPED persons and items
    . Analysis window Replace tabs with blanks before displaying input record, so that displayed alignment matches internal alignment.
    C001 CBCABBAABACAABCABBCBAABCCCCBBA
    ^P   ^I                           ^N
    . "Graphs" window: Empirical plotted points Entire range of empirical points can be displayed.
    . "Graphs" window: Test Empirical Randomness Computation corrected.
    . "Diagnosis" menu "C. Category Function 3.2+" displays all Tables 3.2, 3.3, etc., rating scales
    . "Plots" menu: Excel Scatterplot Correction of plotting failure due to Excel interpreting some item or person labels as invalid numbers
    . "Plots" menu: all plots Correction of failure due to incompatibility with some earlier versions of Excel
    . "Output Files" menu Correct files check-marked when they have been output.
    Enhancements
    . Table 14.1, 18.1 Show counts and scores for DROPPED and INESTIMABLE persons and items
    -------------------------------------------------------------
    |ENTRY   TOTAL  TOTAL           MODEL|   INFIT  |  OUTFIT  |
    |NUMBER  SCORE  COUNT  MEASURE  S.E. |MNSQ  ZSTD|MNSQ  ZSTD|
    |------------------------------------+----------+----------+-
    |     8     27     35                | DROPPED             |
    |    10      0     35                | INESTIMABLE: HIGH   |
    |    11     35     35                | INESTIMABLE: LOW    |
    . Table 23.1, etc. Improved headings for variance Tables to match other Tables.
    was: -- Empirical -- Modeled
    now: -- Observed -- Expected

    . Table 30.1, etc. Report number of active slices used in Mantel-Haenszel DIF computation.
    --------..-------------------------------------------
    | KID      Mantel-Haenszel Size Active TAP          |
    | CLASS    Chi-squ Prob. CUMLOR Slices Number  Name |
    |-------..------------------------------------------|
    | F          .0000 1.000             7      4 1-3-4 |
    | F          .1316 .7167   -.06      7     10 2-4-3-|
    --------..-------------------------------------------
    Width of Mantel-Haenszel slice: MHSLICE = .010 logits
    . Table 42.1 Persons in displacement order matching item Table 25.1
    . Table 43.1 Persons in correlation order matching item Table 26.1
    . CMATRIX=Yes and Table 3.2, etc. When CMATRIX=Yes, output a Category Matrix of the dichotomous or rating-scale categories comparing the Observed Category Frequencies against the Predicted Category Frequencies.
    -------------------------------------------------------
    | Category Matrix : Confusion Matrix : Matching Matrix|
    |             Predicted Scored-Category Frequency     |
    |Obs Cat Freq|           0           1 |        Total |
    |------------+-------------------------+--------------|
    |          0 |      254.70       34.30 |       289.00 |
    |          1 |       34.17      306.83 |       341.00 |
    |------------+-------------------------+--------------|
    |      Total |      288.88      341.12 |       630.00 |
    -------------------------------------------------------
    . IPEXTREME= and Table 1, 12, 16 Placement of persons or items with extreme scores on the Person-Item maps.
    IPEXTREME=Yes. Persons and items with extreme scores placed at the extreme ends of the map.
    IPEXTREME=No. Persons and items with extreme scores placed at their estimated measures on the map.
    . ISFILE= Item-Structure file Include columns for Rasch-Andrich thresholds (THRESH) and amend column headings
    . MTICK= and Table 1, 2, etc. Specifies the measurement distance between tick marks
    -6       -4        -2         0         2         4         6
    |---------+---------+---------+---------+---------+---------|  NUM   TAP
    0                                                0    :     1   15  1-3-2-4-1-3
    . "Graphs" window: "Legend" button Display/Hide Legend active for all graphs.
    . #1#=, etc., tokens #1#= to #9#= are user-defined replaceable tokens of up to 32 characters each. Example:
    Extra Specifications? #3#=analysis2
    Control file:
    PFILE = #3#pf.txt ; this is processed as PFILE = analysis2pf.txt
    . Winsteps short-cuts "Winsteps" label (name) on Windows short-cuts changed to "Winsteps Rasch"
    Winsteps 3.80.1
    September, 2013
    Description
    Bug fixes
    . IFILE=, PFILE=, WMLE Corrected value of Warm's Mean Likelihood Estimate reported for extreme scores = MLE value
    . Menu bar, Diagnosis Menu Display of correct Tables and Subtables
    . Example file, Example0.txt Corrected by removing the errant lines: TFILE=* 23
    . Table 5.2, Table 9.2 ASCII=web: web-page formatting: &#...; corrected to ·
    . Analysis window, Report output file? Display a webpage or Word .doc with the Browser, e.g., Report output file? Myoutput.htm
    . Output Tables in web format: ASCII=web Correct length of underline of heading
    . Plots menu: Excel plots Avoid known bug in some versions of Excel when charts are initiated
    . Edit Initial Settings: Initial settings text box "Variable = name" removed
    . Installation: Silent Install Corrected instructions for a silent install of Winsteps
    Winsteps 3.80.0
    August, 2013
    Description
    Major Enhancements
    . Tables 23.6, 23.16, 23.26, 23.36, 23.46: person measures for item contrasts Table 23.6, etc., Person measures on item clusters within PCA Contrasts
    . Table 34, Scatterplot, IFILE=, PFILE= output files: "Warm" WLE estimates Thomas Warm's (1989) Weighted Mean Likelihood Estimates can be displayed in PFILE= and IFILE=. WLE estimates can also be plotted in the Compare-statistics scatterplot and Table 34. See also The Efficacy of Warm's Weighted Mean Likelihood Estimate (WLE) Correction to Maximum Likelihood Estimate (MLE) Bias.
    . Control instruction: TFILE= output Table selectionTFILE= enables a list of Tables, Subtables and Control instructions to be built into the Control file and reported. Every subtable can be reported individually.
    Minor Enhancements
    . Table 0.4: report of disjoint subsetsTable 0.4 shows Subset Details for the improved disjoint-subset-detection (connectivity) algorithm, which also reports Guttman splits in the data.
    . Tables 1.5, 1.6, 1.7: thresholds in "Wright" Maps of the latent variable. Table 1.5 Item map with expected score zones
    Table 1.6 Item map with 50% cumulative probabilities (Rasch-Thurstone thresholds)
    Table 1.7 Item map with Andrich thresholds (modal categories if ordered)
    . Tables 1.10-1.13, 12.12, 16.13: item easinessTable 1.10, etc., Item easiness = 2 * Person mean ability - Item difficulty
    . Tables 1.11, 1.13, 16.13. Item easiness in "Wright" Maps of the latent variable. Table 1.11, Map of distributions - persons by ability and items by easiness
    Table 1.13 Map of person labels with item distribution by easiness, same as Table 16.13
    . Tables 2.5, 2.6, 2.7, 2.15, 2.16, 2.17: x-axis range Table 2.5, etc., have the same x-axis range as other Table 2 subtables
    . Tables 3.1, 28.3, 29.3, etc.: percentsTable 3.1, etc., shows % next to counts of extreme maximum and extreme minimum persons and items.
    . Tables 6, 10, 23, 24, etc.: sort orderWhen two persons or items have the same sort values, such as fit statistics or loadings, they are ordered by Entry number.
    . Tables 14, 18, etc.: IFILE=, PFILE=, PTBISERIAL=: point-measure correlation PTBISERIAL= ALL, YES, NO, X controls the computation of the point-biserial computations shown in Table 14.1, Table 18.1, IFILE=, PFILE=and similar output.
    PTBISERIAL= ALL - the correlation of the observations and the raw scores for all responses to an item or by a person
    PTBISERIAL= Yes - the correlation of the observations and the raw scores (less the current response) for all responses to an item or by a person
    PTBISERIAL= No - the correlation of the observations and the Rasch measures for all responses to an item or by a person
    PTBISERIAL= X - the correlation of the observations and the Rasch measures (estimated omitting the current response) for all responses to an item or by a person.
    The expected values of the correlations under Rasch conditions are also reported.
    . Table 21: Subtables renumbered by item group First item group: Table 21.1, and for polytomous items, 21.2, 21.3
    Second item group: Table 21.11, and for polytomous items, 21.12, 21.13
    ...
    . Tables 23 and 24: Subtables renumbered by Contrast Contrast 1: Table 23.1, Table 23.2, Table 23.3, Table 23.4, Table 23.5, Table 23.6
    Contrast 2: Table 23.11, 23.12, 23.13, 23.14, 23.15, 23.16
    Contrast 3: Table 23.21, 23.22, 23.23, 23.24, 23.25, 23.26
    Contrast 4: Table 23.31, 23.32, 23.33, 23.34, 23.35, 23.36
    Contrast 5: Table 23.41, 23.42, 23.43, 23.44, 23.45, 23.46
    Similarly for Table 24.1, ...
    . Tables 23.1 and 24.1, etc.: show person distributionTable 23.1, etc., person distribution shown below item Contrast plot, and Table 24.1, etc., item distribution shown below person Contrast plot.
    . Table 35: subtable numberTable 35 Paired-person response agreement: subtables renumber by person group:
    Table 35.1-5 - plots for the entire sample or for the accumulated subsamples selected by PSUBTOTAL=
    Table 35.11-15, 35.21-25, ... - plots for subsamples selected by PSUBTOTAL=
    . Tables 37, 38, 39, 40, 41: subtable numberingKeyForm subtables renumbered for easy reference.
    Table 37. Person KeyForms of responses of persons to items. - Measure order. Was Table 17.3- Table 38. Person KeyForms of responses of persons to items. - Entry order. Was Table 18.3- Table 39. Person KeyForms of responses of persons to items. - Alphabetical order. Was Table 19.3- Table 40. Person KeyForms of responses of persons to items. - Misfit order. Was Table 7.2- Table 41. Person KeyForms of responses of persons to items. - Misfit order, only unexpected responses. Was Table 7.2.1-
    . Output files: IFILE=, PFILE= column headingsClarification of the abbreviated column headings for the observed correlations and the expected correlations in the IFILE= file-name and PFILE= file-name.
    PBSA = point-biserial correlation with all observations in the raw score. PBA-E is its expected value. PBSX = point-biserial correlation with the raw score excluding the current observation. PBX-E is its expected value. PTMA = point-measure correlation with the measure based on all observations. PMA-E is its expected value. PTMX = point-measure correlation with the measure based on all observations. PMX-E is its expected value.
    . Output file: XFILE= file name: observation statusThe analytical status of each observation is shown in the STATUS column of the XFILE=.
    0 = Missing (not administered), 1 = Standard, 2 = in Extreme person score, 3 = in Extreme item score, 4 = in Extreme person and item scores
    . Control instruction: BOXSHOW=No for Table layoutWhen BOXSHOW=No, boxed lines are not shown in Tables, so that they are easier to copy-and-paste into Excel and other software.
    . Control instruction: DATESHOW=No for Table headingWhen DATESHOW=No, the date of the analysis and the version of Winsteps are omitted from the Output Table headings.
    . Control instruction: IOFSFIELDS= field selection for IFILE= The fields displayed in the IFILE= item output file can be selected by IOFSFIELDS= or in the Output File Field Selection dialog box.
    . Control instruction: OFILE= report output file nameThe report output file can be specified in the Control File using OFILE= file name. This is useful with TFILE=.
    . Control instruction: POFSFIELDS= field selection for PFILE= The fields displayed in the PFILE= item output file can be selected by POFSFIELDS= or in the Output File Field Selection dialog box.
    . Control instruction: TCCFILE= file name: Test Characteristic CurveOutputs the plotting coordinates for the Ability Measure (theta), Test Characteristic Curve, Test Information Function and Standard Error of Measurement to TCCFILE= file.
    . Edit menu: Edit Initial Settings dialog box: Analysis Window: user-settable Font and Font size The default font in the Winsteps Analysis Window is usually Courier New, 15 points. You can change the font and font size in Edit Initial Settings Edit Initial Settings dialog box.
    . Excel/RSSST menu: Importing data from Excel file: remove trailing blanksExcel/RSSST menu, remove trailing fixed spaces when importing cell contents from Excel
    . Output Files menu: alphabetized The file types are listed alphabetically by control instruction in the Output Files menu.
    . Silent Install of Winsteps and MinistepInstructions for Silent Install of software
    Bug Fixes
    . Tables 3, 27, 28: summary statisticsCorrected summary statistics when items or persons are deleted or deslected from the Specification menu dialog box.
    . Tables 6, 10, 23, 24, etc.: sort orderWhen two persons or items have the same sort values (such as fit statistics or loadings), they are ordered by Entry number.
    . Tables 23.2 and 24.2: person and item clustersTable 23.2, etc., better selection of item clusters within item Contrasts, and Table 24.2, etc., better selection of person clusters within person Contrasts.
    . Tables 23.4 and 24.4, etc.: person/items interacting with clustersTable 23.4, etc., better selection of persons interacting with item clusters, and Table 24.4, etc., better selection of items interacting with person clusters
    . Tables 23.99 and 24.99, etc.: selection of correlated itemsTable 23.99,, better selection of highly correlated items, and Table 24.99, etc., better selection of highly correlated persons
    . Table 29: display of expected curvesTable 29.1, etc., corrected plotting of "expected" curves
    . Tables 30.1, 31.1, 33.1: Mantel or Mantel-HaenszelTable 31.1, etc., corrected column heading: Mantel-Haenszel for dichtomies, and Mantel for polytomies.
    . Excel/RSSST menu box: input data response frequenciesInput data from Excel, SPSS etc., correction of Excel and SPSS input-file problems, and bug in counting response frequencies,also
    WININPUT 3.72.3 at excelmod line: 10520 Error: 3EC Unable to set the ColumnWidth property of the Range class
    WININPUT: failure with big numeric tab-separated values (789) in line 12981
    . SPSS output files: file selectionOutput to SPSS etc., correction of file-selection problem.
    . Plotting with Excel: graph-typeExcel plots etc., correction Excel default-graph-type problem in Excel 2013.
    . Analysis Window closing dialog box: retain choice"Do you want to close all output windows for the closing analysis?" - actioned: "Yes, and from now on" and "No, and from now on"
    Security
    . Code signingCOMODO Digital Code Signing Certificate to verify publisher identity
    . Code execution protection Address Space Layout Randomisation (ASLR) and Data Execution Prevention (DEP) activated
      Winsteps 3.75 (October 20, 2012)
      ---------------------------------------------------------------------------------------------------
      |ENTRY   TOTAL  TOTAL           MODEL|   INFIT  |  OUTFIT  |PT-MEASURE |EXACT MATCH|              |
      |NUMBER  SCORE  COUNT  MEASURE  S.E. |MNSQ  ZSTD|MNSQ  ZSTD|CORR.  EXP.| OBS%  EXP%| TAP          |
      |------------------------------------+----------+----------+-----------+-----------+--------------|
      |     3     35     35   -6.59    1.85|      MINIMUM MEASURE|  .00   .00|100.0 100.0| 1-2-4        |
      |     4     32     35   -4.40     .81| .90    .0| .35   -.2|  .55   .53| 94.1  94.0| 1-3-4        |
      |     5     31     35   -3.83     .70|1.04    .2| .52    .1|  .55   .55| 88.2  91.7| 2-1-4        |

       
      With anchoring: IAFILE=* 4,10 *  
      ------------------------------------------------------------------------------------------------------------
      |ENTRY   TOTAL  TOTAL           MODEL|   INFIT  |  OUTFIT  |PT-MEASURE |EXACT MATCH|        |              |
      |NUMBER  SCORE  COUNT  MEASURE  S.E. |MNSQ  ZSTD|MNSQ  ZSTD|CORR.  EXP.| OBS%  EXP%|DISPLACE| TAP          |
      |------------------------------------+----------+----------+-----------+-----------+--------+--------------|
      |     3     35     35    7.62    1.85|      MINIMUM MEASURE|  .00   .00|100.0 100.0|    -.02| 1-2-4        |
      |     4     32     35   10.00A    .77| .81   -.3| .30   -.2|  .55   .53| 97.1  93.2|    -.24| 1-3-4        |
      |     5     31     35   10.37     .70|1.04    .2| .52    .1|  .55   .55| 88.2  91.7|    -.02| 2-1-4        |


      Table 36. PKMAP Kidmap output to Web Browser with ASCII=Webpage
      Winsteps histogram
      Histogram
    1. Enhancement: 1. Person-Item Histograms or Barcharts from Graphs Menu: much improved display.
    2. Enhancement: 2. Table 23 (dimensionality). Inter-item-cluster ability correlation, Table 23.0 correlations
      Approximate relationships between the KID measures
       PCA      ACT       Pearson       Disattenuated Pearson+Extr  Disattenuated+Extr
      Contrast  Clusters  Correlation   Correlation   Correlation   Correlation
       1        1 - 3     0.1404        0.2175        0.1951        0.2923
       1        1 - 2     0.2950        0.4675        0.3589        0.5485
       1        2 - 3     0.8065        1.0000        0.8123        1.0000
       
    3. Enhancement: 3. EFILE= "expected scores on items" file (Reckase expected score scalogram). EFILE=
      ; EXPECTED SCORES FOR Knox Cube Test (Best Test Design p.31)
      MEASURE  SCORE      4      5     14     15     16     17
        -7.00    .11    .07    .04    .00    .00    .00    .00
        -6.85    .12    .08    .04    .00    .00    .00    .00
        -6.70    .14    .09    .05    .00    .00    .00    .00
        -6.55    .16    .10    .06    .00    .00    .00    .00
      .....
         7.70   5.74   1.00   1.00    .98    .92    .92    .92
         7.85   5.78   1.00   1.00    .98    .93    .93    .93
         8.00   5.81   1.00   1.00    .99    .94    .94    .94
      
    4. Enhancement: 4. Table 3.1, Table 27 (summary statistics). Counts of items with MAXIMUM SCOREs and MINIMUM SCOREs corrected Table 3.1 Table 27
    5. Enhancement: 5. Table 7.1, Table 11.1 (response strings). Reformatted and controlled by T7OPTIONS=OERZ Table 7.1 Table 11 T7OPTIONS=
    6. Enhancement: 6. DISFILE= (distractor file) headings corrected: "ALL" to "UNWTD", "USED" to "WTD" DISFILE=
    7. Enhancement: 7. Output files to Excel: EXCELNUMBER=Yes allows Excel to convert numerical-character labels into numbers EXCELNUMBER=
    8. Enhancement: 8. GRFILE= (ICC graphing file) bug squashed that omitted some items from the output file GRFILE=
    9. Enhancement: 9. ICORFILE=, PCORFILE= (inter-item and inter-person correlation matrices). Correlations to 6 decimal places instead of 4 decimal places. ICORFILE= PCORFILE=
    10. Enhancement: 10. IFILE=, PFILE= (item and person statistics). Heading word, "ERROR", changed to "MODLSE" or "REALSE" IFILE= PFILE=
    11. Enhancement: 11. XFILE= (response file) dialog box - allow multiple ranges for persons and items XFILE= dialog box
    12. Enhancement: 12. R-statistics interface: improved discovery of installed R-statistics software (if any): Edit Menu: Edit Initial Settings dialog box Edit Initial Settings
    13. Enhancement: 13. Files Menu: lists 30 most recently used Control Files File Menu
    14. Enhancement: 14. Files Menu: "Open File" opens in folder of most recently used Control File File Menu
      Winsteps 3.74 (4/16/2012)
    1. Enhancement: Tables 1, 12, 16: MORE=, LESS=, RARE=, FREQUENT= column headings
    2. Enhancement: Tables 27, 28 Subtotals: one-way ANOVA and fixed-effects chi-square for subtotals
    3. Enhancement: Tables 30.1, 31.1 DIF: show Observed-Expected Averages
    4. Enhancement: GRFILE= has 1000 points
    5. Enhancement: IPMATRIX "Measure Difference" shown with 4 decimal places
    6. Enhancement: TABLES= from the Specification menu dialog box
    7. Enhancement: UEXTREME=Yes include extreme scores when centering person or item measures
    8. Enhancement: XFILE= shows response-weight and more-probable response
    9. Enhancement: Graph window: Test Characteristic Curve has 1001 points
    10. Bug fix: Table 14.1 etc. better estimate of upper asymptote for items with extreme scores
    11. Bug fix: Table 14.3 and DISFILE=. computations of Outfit Mean-square now agree
    12. Bug fix: IPMATRIX= fixed length output: invalid character near column 500
    13. Bug fix: program crash formatting large numbers for output
    14. Bug fix: program crash formatting long lines for screen output
    15. Bug fix: program crash during "Reading Control Variables" for IVALUE= without IREFER=
    16. (4/19/2012) Bug fix: IFILE=, PFILE= to SPSS .sav file: incorrect column headings for InMnZemp, InMnZstd, OutMnZemp, OutMnZstd
      Winsteps 3.73 (12/5/2011)
    1. Enhancement: PMAP=N IMAP=N options to display entry numbers on variable maps
    2. Enhancement: Table 3.1: Capped Binomial Deviance for Dichotomous items
    3. Enhancement: immediate verification that input files exist
    4. Clarification: "Andrich Threshold" heading in Table 3.2
    5. Bug fix: EDFILE= file1+file2 did not work
    6. Bug fix: EDFILE= error message for persons or items with 0 or negative entry numbers
    7. Bug fix: UCOUNT= high number crash
    8. Bug fix: PMAP=M crash
    9. Bug fix: Diagnosis Menu: add Table numbers and display correct Tables.
    10. Bug fix: wrong working directory for DATA= at the Extra prompt: corrected to the current working directory.
    11. Bug fix: program crash when writing long error messages
    12. Bug fix: text fits in buttons of graphical bar-chart window (Graphs menu)
    13. Bug fix: display correct estimated item discrimination for zero-weighted items
    14. Bug fix: expression evaluation, e.g., SAFILE=* 1 -1-1 * should be -2
    15. Bug fix: MFORMS= failure at 640 files
      Winsteps 3.72 (5/5/2011) 3.72.2 (5/31/2011) 3.72.3 (8/1/2011)
    1. 3.72.3.1 Bug fix: Corrected failure with TFILE=* 6.4 * or TFILE=* 10.4 *
    2. 3.72.3.1 Bug fix: Corrected incorrect sub-table selection with TFILE=* 1.10 *
    3. 3.72.3 Bug fix: Table 0.2 etc. can be output with TFILE=
    4. 3.72.3 Bug fix: Table 3.2, etc.: ISRANGE= for multiple item groups
    5. 3.72.3 Bug fix: Tables 30.1: Corrected computation of Mantel and Mantel-Haenszel chi-squares and Liu-Agresti cumulative log-odds ratio.
    6. 3.72.3 Bug fix: Table 33: DIF=* (list) * and DPF=* (list) * supported.
    7. 3.72.3 Bug fix: Table 36: Colored PKMAP= display correctly in Firefox browser
    8. 3.72.3 Enhancement: Output files: IFILE=, PFILE=, DISFILE= output 4 decimal places with variable-length fields
    9. 3.72.3 Enhancement: Output files to .sav: SPSS print defaults for numbers now have 4 decimal places
    10. 3.72.3 Bug fix: Plots: DIF plot now blank for missing comparisons
    11. 3.72.3 Bug fix: Excel/RSSST: file conversion failure due to Windows bug
    12. 3.72.2 Enhancement: replace ASCII control characters in data file by blanks
    13. 3.72.2 Bug fix: improved half-rounding of integer output
    14. 3.72.2 Bug fix: UDECIM= applied to Table 3.1
    15. 3.72.2 Bug fix: Corrected item weighting when PTBISERIAL=EXCLUDE
    16. 3.72.1 Bug fix: Long output lines with ASCII=Web or ASCII=Doc not truncated
    17. Enhancement: Table 36 and PKMAP= supports formatting options, sorting, and selecting based on fit size, (replaces KIDMAP=).
    18. Enhancement: Table 35 and AGREEFILE=, option to only compare within PSUBTOTAL= person classification-groups
    19. Enhancement: ASCII=Doc outputs Tables in HTML to Microsoft Word or equivalent.
    20. Enhancement: IPRFILE= supports response recoding for blocks of persons and items in the input data
    21. Enhancement: OUTFIT = Both (infit and outfit) or Yes, Outfit = Infit or No, Outfit = Outfit, for misfit sort order (descending)
    22. Enhancement: Make Winsteps foreground window active when user action needed
    23. Enhancement: Graph window - Graphing of categories: add more sliders for fine-adjustment of x- and y-axes
    24. Bug fix: Bubble chart failure if other action performed simultaneously.
    25. Bug fix: Program crash due to very long control statements causing internal buffer overflow
    26. Bug fix: CODES= maximum is 255 codes. Too many codes were not detected, causing program crash.
    27. Bug fix: ; GROUPS = 0 is now a comment in Excel/RSSST data file conversion to Winsteps format
    28. Bug fix: EQFILE= no longer ignored nor misinterpreted
    29. Bug fix: IDELETE=+1 and PDELETE=+1 correctly delete all other items or persons
    30. Bug fix: PDFILE= selection now also done correctly from "Specification" menu
      Winsteps 3.71.0 (1/30/2011) : PDF showing major enhancements
    1. Bug fix:(3.71.0.1 - 2/1/2011): ASCII=webpage mis-formats
    2. Major Enhancement: Table 36 Person diagnostic KIDMAPs
    3. Major Enhancement: Table 35 Paired-person response agreement (cheating detection) and AGREEFILE= showing agreement-counts between person pairs.
    4. Major Enhancement: SFUNCTION= and ISRANGE= for polynomial smoothing, interpolation and extrapolation of Rasch-Andrich thresholds
    5. Enhancement: file=? opens the Browser window: e.g., SFILE=? and SAFILE=?
    6. Enhancement: Graph window: more arrows for fine-tuning the x-axis and the y-axis.
    7. Bug fix: Tables 17.3 etc. sometimes not displayed
    8. Bug fix: Duplicate error messages for missing files
    9. Bug fix: Correct SAFILE= values reported as incorrect: "SAFILE= is in wrong format. Expecting second number or number-number"
    10. Bug fix: Excel/SSSSR - SPSS .sav input file conversion: long variable name omitted for first item.
      Winsteps 3.70.1 (12/1/2010)
    1. Enhancement: (3.70.1.1 - 12/5/2010): accomodate change in R Statistics version 2.12
    2. Enhancement: (3.70.1.1 - 12/5/2010): Tables 27 and 28, display progress bar on Winsteps analysis screen
    3. Enhancement: CURVES= selects curve-type for Table 21 only
    4. Enhancement: ISFILE= report Rasch-Andrich threshold S.E. for all thresholds
    5. Enhancement: T2SELECT= to select the sub-tables of Table 2 for display
    6. Enhancement: TFILE= Table 0 can be specified or omitted
    7. Enhancement: TFILE= individual sub-tables can be specified
    8. Enhancement: XFILE= column for "More Probable Response"
    9. Enhancement: Excel/RSSST: allow tab, comma and semi-colon -separated text-tab input files
    10. Enhancement: Initial values file (Winsteps.ini) in Windows "Application Data" folder, not Winsteps folder.
    11. Bug fix: Excel/RSSST menu: prevent crash displaying text-tab files
    12. Bug fix: Output Tables menu: report all sub-tables for Table 2. and Table 3.2 etc.
    13. Bug fix: Subsets: prevent false reporting of subsets with rating scales
      Winsteps 3.70.0 (7/1/2010)
    1. Bug fix:(3.70.0.5 - 10/12/2010): Report reliability/separation for including extreme scores
    2. Bug fix:(3.70.0.5 - 10/12/2010): Analysis screen: show total score summary with reliability/separation for including extreme scores
    3. Bug fix:(3.70.0.5 - 10/12/2010): Allow item and category ranges: anchor file format
    4. Bug fix:(3.70.0.4 - 9/18/2010): Incorrect subset reporting with person/item anchors
    5. Change: (3.70.0.3 - 9/7/2010): XMLE= discontinued due to poor performance
    6. Change: (3.70.0.3 - 9/7/2010): Wording change: Raw score "test" reliability in Table 3.1
    7. Bug fix:(3.70.0.3 - 9/7/2010): Sort failure when tables output in unusual order
    8. Bug fix:(3.70.0.3 - 9/7/2010): "MISMATCH" failure, detected by self-check in the data-compression routine
    9. Bug fix:(3.70.0.2 - 7/5/2010): Standard Deviations can be slightly inaccurate due to loss of floating-point precision
    10. Bug fix:(3.70.0.1 - 7/5/2010): Explicit "Average Ability" in distractor table
    11. Bug fix:(3.70.0.1 - 7/5/2010): Excel reformating labels like 123E45 as floating point numbers
    12. Bug fix:(3.70.0.1 - 7/5/2010): different subsets reported for the same response string
    13. Bug fix:(3.70.0.1 - 7/5/2010): Default to launch .txt, xls, .sav files with Windows "open" default
    14. Bug fix:(3.70.0.1 - 7/5/2010): "Person codes write failure" when using EDFILE= with no DATA=
    15. Bug fix:(3.70.0.1 - 7/5/2010): "MISMATCH" failure, detected by self-check in the data-compression routine
    16. Bug fix:(3.70.0.1 - 7/5/2010): "85" error (or crash on launch) when opening invalid output files
    17. Enhancement: Tables 31, 32: within-group/between-group fit statistics reported
    18. Enhancement: Increased Windows 7 compatibility: routine Winsetup-exe renamed Windata-exe
    19. Enhancement: Scatterplot dialog box: include Entry number and RMS residual fields for plotting
    20. Enhancement: IFILE=, PFILE= default is to include all fields. Omit fields with "Output Files", "Select Fields"
    21. Enhancement: Allow LOADJ= as well as LOWADJ=
    22. Enhancement: Format output files for ConstructMap 5.4
    23. Enhancement: PFILE= and IFILE= default is no ";" for extreme scores (reset with Output Files, IFILE=, File selection)
    24. Enhancement: Table 14.3 "AVERAGE MEASURE" clarified to "AVERAGE ABILITY"
    25. Bug fix: Floating point numbers correctly decoded: tested with 1e-4 2d+2 1.14e1 1.24d2
    26. Bug fix: Transposed file: CODES=, trailing blanks truncated
    27. Bug fix: winsetup-exe changed to windata-exe to avoid Windows UAC error
    28. Bug fix: tweaking of data-connectivity "subset" algorithm for indirect connections and anchoring
    29. Enhancement: subset reporting in Table 0.2
      Winsteps 3.69.1 (12/31/2009)
    1. Bug fix:(3.69.1 - 12/31/2009): person labels sometimes reported incorrectly in 3.69.0
    2. Bug fix:(3.69.1 - 12/31/2009): missing data sometimes reported incorrectly in 3.69.0
    3. Bug fix:(3.69.1 - 12/31/2009): incorrect processing of R-Statistics data files
    4. Bug fix (3.69.1.1 - 1/4/2010): occasional crash or hang in "subset probe" routine
    5. Bug fix (3.69.1.1 - 1/4/2010): failure to delete temporary files
    6. Bug fix (3.69.1.2 - 1/12/2010): Table 3: VALID RESPONSES: 99.9% incorrectly shown when there are 100% valid responses
    7. Bug fix (3.69.1.2 - 1/12/2010): Tables 23 and 24: small corrections to computation of "explained" and "unexplained" variance terms
    8. Bug fix (3.69.1.2 - 1/12/2010): corrected link to Help from the Specification Menu dialog box
    9. Bug fix (3.69.1.2 - 1/12/2010): recovery from inaccessible Windows temporary folder: "Windows temporary folder failure"
    10. Bug fix (3.69.1.3 - 1/14/2010): occasional scatterplot failure when selecting IFILE/PFILE
    11. Bug fix (3.69.1.4 - 1/18/2010): Table 2: 5 digit item numbers displayed in full, not as ****
    12. Bug fix (3.69.1.4 - 1/18/2010): Tab-separated number failure: Value problem in IREFER=*: 1-D
    13. Bug fix (3.69.1.4 - 1/18/2010): Failure reading control files with very long, incorrect, control instructions
    14. Bug fix (3.69.1.4 - 1/18/2010): Clearer error message for "unexpected end of file"
    15. Bug fix (3.69.1.4 - 1/18/2010): Graph screen: occasional incorrect labeling of distractor/option curves
    16. Bug fix (3.69.1.4 - 1/18/2010): Graph screen: occasional appearance of bogus distractor/option curves
    17. Bug fix (3.69.1.5 - 1/25/2010): Tables 6, 10: "better fitting omitted" line printed
    18. Bug fix (3.69.1.5 - 1/25/2010): Tables 6, 7, 10, 11: misfit sort-order improved
    19. Bug fix (3.69.1.5 - 1/25/2010): Tables 3.1, 27, 28: TOTALSCORE=YES actioned to display total scores (with extreme scores)
    20. Bug fix (3.69.1.5 - 1/25/2010): crash on CODES= over 1,000 characters. CODES= up to 4,000 characters now allowed
    21. Bug fix (3.69.1.6 - 2/1/2010): copy-and-paste from Winsteps analysis screen fails. Clipboard locks up
    22. Bug fix (3.69.1.7 - 2/3/2010): remove superfluous (green) line from Excel DIF and DPF plots.
    23. Bug fix (3.69.1.8 - 2/27/2010): incorrect function of EDFILE= with large files
    24. Bug fix (3.69.1.8 - 2/28/2010): control file failure with SPFILE=
    25. Bug fix (3.69.1.9 - 3/10/2010): correction so that STBIAS=YES with anchor values produces same estimates as earlier versions
    26. Bug fix (3.69.1.10 - 3/20/2010): correction so that SAFILE= anchors ISGROUPS= rating-scales
    27. Bug fix (3.69.1.11 - 3/28/2010): correction to webpage display and open/save file boxes
    28. Bug fix (3.69.1.12 - 3/31/2010): allow silent install: correction to allow long simulated data records
    29. Bug fix (3.69.1.13 - 4/1/2010): correction to minimum counts and scores for "extreme+non-extreme" persons in Table 3.1
    30. Bug fix (3.69.1.14 - 4/14/2010): Ctrl+F to skip out of Probing Connection and also Table 23
    31. Bug fix (3.69.1.14 - 4/14/2010): Headings "Total" or "Non-extreme" in measure and score tables
    32. Bug fix (3.69.1.14 - 4/14/2010): crash with IDELETE= and IDFILE= and item number bigger than NI=
    33. Enhancement (3.69.1.15 - 5/3/2010): Table 33 - DGF. Add DGF SCORE columns and improve sort order.
    34. Enhancement (3.69.1.15 - 5/3/2010): DIF/DPF/DGF Plots. Add "Average Score-points" plot.
    35. Enhancement (3.69.1.15 - 5/3/2010): Graph window: Multiple ICCs: Select All Model ICCs and Select All Empirical ICCs
    36. Bug fix (3.69.1.15 - 5/3/2010): remove inoperative "Close Open Windows" from Files menu
    37. Bug fix (3.69.1.15 - 5/3/2010): correct functioning of CUTLO= CUTHI= for data trimming
    38. Bug fix (3.69.1.15 - 5/3/2010): iteration screen: reported size of maximum category residual
    39. Bug fix (3.69.1.16 - 5/23/2010): Table 20: omitted first digit if very long number output.
    40. Bug fix (3.69.1.16 - 5/23/2010): Table 20 + SCFILE=: eliminate very small numerical differences.
    41. Bug fix (3.69.1.16 - 5/23/2010): Table 3.1: valid observation % is approximate
    42. Bug fix (3.69.1.16 - 5/23/2010): "mismatch" error with missing data and NI= > 255
    43. Bug fix (3.69.1.16 - 5/23/2010): Graph window - Graphing: after Multiple ICCs: Index out of bounds
      Winsteps 3.69.0 12/29/2009 : PDF showing all 39 changes
    1. Up to 9,999,999 persons and 64,000 items. Relatively faster processing and relatively smaller disk requirements. For example, a test analysis took 8 days in Winsteps 3.68, 8 days, but only 8 hours in Winsteps 3.69.
    2. More compact input-data-files for sparse data: EDFILE=.
    3. Convenient data conversion from Excel, R, SAS, SPSS, STATA data files.
    4. Singular-Value-Decomposition, SVD, of residuals - for investigating multidimensionality
    5. Root-mean-square residuals, RMSR, reported
    6. Many minor enhancements and bug-fixes
      Winsteps 3.68.2 04/20/2009
    1. Last version of Winsteps for pre-2000 PCs and Windows: pre-Pentium-4 PCs and Windows 98SE, NT, ME
    2. Bug fix: crash with large plots in Excel 2007
    3. Graphic barchart: user-adjustable alignment of sides of lower box
    4. Winsteps: rare memory crash
    5. Bug fix: SPSS 17 file access problem
    6. Bug fix: Graphs - black selection boxes mispositioned when curve is selected
      Winsteps 3.68.1 02/18/2009
    1. Tables 27.1, 28.1: Welch t-test for 2 subtotals reinstated. Omitted in 3.68.0.
      Winsteps 3.68.0 02/15/2009 : PDF showing all 12 changes
    1. 12 enhancements and bug-fixes including:
    2. Person-item distribution bar-chart, shown →
    3. Reliability of mean sub-total measures reported
    4. Immediate display of output files with FSHOW=Yes
    5. Modules updated to accord with Microsoft Security Alert
      Winsteps & Microsoft 12-2008
    1. Security update for modules that are used in Winsteps, Facets, Ministep, Minifac, Bond&FoxSteps
    2. This is in addition to the Windows Update.
    3. Please be sure that your anti-virus software is active and up-to-date.
    4. Please perform the cumulative security update (10MB) from Microsoft: http://support.microsoft.com/kb/957924/
      Winsteps 3.67.0 11/26/2008 : PDF showing all 27 changes
    1. 27 enhancements and bug-fixes including:
    2. Output file formats for Excel, R statistics, SPSS, webpages and text files
    3. SIFILE= simulation files: resampling option
    4. Table 1 variable map: width adjustable with LINELENGTH= allows for longer labels to be displayed
    5. Edit menu: Edit initial settings: Default value of any control variable can be specified
    6. Edit menu: reformatted data file (after FORMAT=) can be displayed
      Winsteps 3.66.0 9/2/2008 : PDF showing all 35 changes
    1. 35 enhancements and bug-fixes including:
    2. Expected values of correlations: Tables 6, 10, 13, 14, 15, 17, 18, 19: Point-biserial correlations: observed and expected values
    3. Total score now the default (TOTALSCORE=Yes): Tables 6, 10, 13, 14, 15, 17, 18, 19: total score is the default, not the score less extreme response strings
    4. Welch's t-test: Table 30: DIF significances computed with Welch's improved version of Student's t-test
    5. Percentiles: Tables 2, 20, 27, 28: Percentiles shown under distributions
    6. Data editing: EDFILE= selective editing of input data
    7. Excel scatterplot: computations of correlations; user-settable confidence bands
      Winsteps 3.65.0 4/3/2008 : PDF showing all 31 changes
    1. 31 enhancements and bug-fixes including:
    2. All Tables: prettier display options: drawing characters and web-page format
    3. Automatic display of output Tables specified in control file
    4. Tables 23, 24: Variance explained by persons and also by items based on raw residuals not standardized residuals
    5. Tables 30, 31, 33: DIF computation for extreme scores now regularized
    6. SIFILE= simulations now with user-specified seed and multiple file options
    7. Graph window: display Legend button
    8. Help: now Vista-compatible HTMLHelp
      Winsteps 3.64.2 11-6-2007 : PDF showing all 11 changes
    1. Enhancement: STATA added to EXCEL/SAS/SPSS interface. Also conversion of STATA/EXCEL/SAS/SPSS to tab-separated format
    2. Enhancement; PSELECT=, ISELECT=, omission with ~
    3. Enhancement: analysis window can be saved and edited
    4. Bug fix: Tables 1.3, 16.3: M,S,T on wrong side of vertical axis
    5. Bug fix: Table 14.1, etc.: formatting large numbers
    6. Bug fix: Table 14.3, etc.: number formatting problem and improved accuracy
    7. Bug fix: Tables 27, 28: do not report subtotal tables with all zeroes
    8. Bug fix: Tables 3, 27, 28: inestimable correlations reported as 0, not -1.
    9. Bug fix (later): Tables 23, 24: program crash with ISGROUPS=
      Winsteps 3.64.1 9-24-2007
    1. Clarification of EXCEL/SAS/SPSS interface: simplified process, improved Help and more robust processing
      Winsteps 3.64.0 9-18-2007 : PDF showing all 11 changes
    1. Enhancement: Improved data-input from Excel files.
    2. Enhancement: DIF summary chi-squares in Tables 30.4, 31.4
    3. Enhancement: more transposed-file output options
    4. Enhancement: installation checks for existing SPSS interface
    5. Enhancement: Vista-compatible ".chm" help
    6. Bug fix: Graphs - "copy graph to clipboard" functions
    7. Minor bug fixes and cosmetic improvements
      Winsteps 3.63.2 7-2-2007
    1. Enhancement: Table 30, 31, 33: checkbox to include or exclude extreme scores in DIF/DPF computations
    2. Bug fix: SIFILE= simulated data file: random numbers seeded with current system time
    3. Bug fix: DISFILE= distractor file: calculation of missing data percent corrected
    4. Bug fix: Windows clipboard always released
    5. Compatibility: huge file handling (64-bit) in Windows XP, Vista
      Winsteps 3.63.1 1-30-2007
    1. Bug fix: winsetup-exe - data setup routine: missing menu entries
      Winsteps 3.63.0 10-19-2006
    1. Enhancement: Add non-uniform DIF to Graph menu.
    2. Enhancement: Display nonuniform DIF Graph
    3. Enhancement: Empirical curves: choice of points, lines and points+lines Lines, not points: Click for points, lines, points+lines : Winsteps Output
    4. Enhancement: Limit ZSTD to d.f. >=1. To largely avoid counterintuitive ZSTD values. Very low mean-square with positive zstd is counterintuitive. It results from meaninglessly small d.f. Prevent computational d.f. falling below 1.0
    5. Enhancement: XFILE= usersettable decimal places
    6. Enhancement: XFILE= kurtosis of expectation around observation.
    7. Enhancement: XFILE= Residual file. Fixed fields always separated with a blank space. Fields abut. Fields separate
    8. Enhancement: Subset reporting: On-screen reporting and report output file Incomplete details: Full details:
    9. Enhancement: Subset reporting included on measure tables No subset information Subset information
    10. Enhancement: Table 20: Prediction of scores from measures and vice-versa Minimal details:
    11. Bug fix: Tables 23, 24. Occasional garbage characters in Tables.
    12. Bug fix: RFILE= crash with long item names No failure
    13. Bug fix: Table 20. Score table conversion factors incorrectly computed UMEAN= USCALE= Incorrect values: Correct values:
    14. Bug fix: UASCALE= can malfunction when UMEAN<>0.
      IAFILE=*
      2 400 ; item 2 anchored at 400
      *
      UASCALE=100
      UMEAN=500
      USCALE=100
      UANCHOR=Yes
      Anchored value reported as 900 <= incorrect
      IAFILE=*
      2 400 ; item 2 anchored at 400
      *
      UASCALE=100
      UMEAN=500
      USCALE=100
      ; UANCHOR= no longer required. Assumed when
      UASCALE= is used.
      Anchored value reported as 400 <= correct
    15. Enhancement: Task bar caption identifies analysis Task bar does not show control file: Task bar shows control file:
    16. Enhancement: Task bar caption: user-settable No user-setting option: Task bar user-settable:
    17. Enhancement: Faster initial installation 15 seconds, now 1 second
    18. Bug fix: Open file sometimes doesn't respond with Control File box File name enter-key is sometimes ignored: File dialog box appears:
    19. Bug fix: GROUPS= occasional crash
    20. Enhancement: Paste one multiple character cell into adjacent cells, one character per cell Only first character pasted: Choice of first or all characters:
    21. Bug fix: NAMELEN= ignored
    22. Bug fix: Labels displayed with surrounding quotes.
    23. Bug fix: ISGROUPS= longer than observed response string allowed. If ISGROUPS= is longer than observed response string, Winsteps Data Setup crashes
    24. Enhancement: Plotting with Excel 2007 Beta supported. Note: Excel 2007 Beta lacks some capabilities
    25. Enhancement: non-uniform DIF graphs
    26. Enhancement: user-settable decimal places on XFILE=
      Winsteps 3.62.1 8-6-2006 (roughly matches Bond&FoxSteps, Bond & Fox, 2edn.)
    1. Enhancement: PTBIS=Y excludes current response from total score. PTBIS=A includes all responses in total score. PTBIS=M measure-based correlation
    2. Bug fix: occasional crash when writing PFILE= or IFILE=
      Winsteps 3.62.0 7-28-2006
    1. Enhancement: Distractor file: percents computed for non-missing categories ignoring missing.
    2. Bug fix: point-biserials reported as zero for deletes and extreme scores
    3. Bug fix: SPSS labels: 64-character labels reported, requires use of your own spssio32.dll
    4. Enhancement: DPF, DIF reported for extreme scores
    5. Bug fix: mean measures shown on report screen (instead of blank space)
    6. Enhancement: Table 2 more informative with many categories
    7. Bug fix: Data setup module does not cause Winsteps window to close
    8. Enhancement: Excel bubble plot - remove annoying text box
    9. Enhancement: Rasch-Thurstone thresholds identified in Table 2
    10. Bug fix: Outfit standardized t-statistics corrected for very small d.f.
    11. Bug fix: Chart=Yes display corrected for missing "|"
    12. Bug fix: Enter key sometimes ignored (requires multiple presses to work)
    13. Enhancement: Diagnosis menu: person misfit added
      Winsteps 3.61.1 5-22-2006
    1. Bug fix: !!SPSS failure during SPSS file conversion
      Winsteps 3.61.0 5-17-2006
    1. Enhancement: choice of indicators (international): decimal points and decimal commas etc.
    2. Enhancement: choice of heading lines, separators and quoted character fields on output files
    3. Enhancement: distractor point-measure correlations exclude missing responses
    4. Enhancement: Excel plots - names and titles improved (Plot 30, 31, 33) DIF, DPF, DGF display
    5. Enhancement: allow longer SPSS variable names
    6. Enhancement: user scaling calculator (Help menu)
    7. Enhancement: Tables 30, 31, 33: improved DIF estimates for extreme scores.
    8. Precautionary: hex code "A0" as blank
    9. Precautionary: set topmost temporarily option - done
    10. Precautionary: remove confusing "yardstick" index from variance-explained reports
    11. Precautionary: detect non-ASCII text files (UTF- etc.)
    12. Precautionary: "Distracter" spelt "Distractor"
    13. Precautionary: Table 30.1, 31.1, 33.1, 33.3: all paired comparisons listed explicitly
    14. Precautionary: Table 30.3, 31.3: item/person within class
    15. Precautionary: PCAR loadings shown in two adjacent columns - to emphasize they are equally important
    16. Precautionary: specification pull-down box: "OK and again" added.
    17. Precautionary: right-click to move dialog boxes (for low screen resolutions)
    18. Help: how to change screen resolution
    19. Help: Double precision is good to 700 logits! (single to 90 logits)
    20. Bug: fix automatic screen close
    21. Bug: fix size of selection box on graphs
    22. Bug: fix occasional memory overwrite for Table 33
    23. Bug: fix Table 11 crash when XMLE=Yes
    Winsteps+Facets small CD-ROM
    Winsteps+Facets small CD-ROM
    original Bigsteps Diskette
    Original Bigsteps diskette.
    Bigsteps was distributed by MESA Press.

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    Rasch Publications
    Rasch Measurement Transactions (free, online) Rasch Measurement research papers (free, online) Probabilistic Models for Some Intelligence and Attainment Tests, Georg Rasch Applying the Rasch Model 3rd. Ed., Bond & Fox Best Test Design, Wright & Stone
    Rating Scale Analysis, Wright & Masters Introduction to Rasch Measurement, E. Smith & R. Smith Introduction to Many-Facet Rasch Measurement, Thomas Eckes Invariant Measurement: Using Rasch Models in the Social, Behavioral, and Health Sciences, George Engelhard, Jr. Statistical Analyses for Language Testers, Rita Green
    Rasch Models: Foundations, Recent Developments, and Applications, Fischer & Molenaar Journal of Applied Measurement Rasch models for measurement, David Andrich Constructing Measures, Mark Wilson Rasch Analysis in the Human Sciences, Boone, Stave, Yale
    in Spanish: Análisis de Rasch para todos, Agustín Tristán Mediciones, Posicionamientos y Diagnósticos Competitivos, Juan Ramón Oreja Rodríguez
    Winsteps Tutorials Facets Tutorials Rasch Discussion Groups

    Coming Rasch-related Events
    Feb. 27 - June 24, 2017, Mon.-Sat. On-line: Advanced course in Rasch Measurement Theory (EDUC5606), Website
    March 31, 2017, Fri. Conference: 11th UK Rasch Day, Warwick, UK, www.rasch.org.uk
    April 2-3, 2017, Sun.-Mon. Conference: Validity Evidence for Measurement in Mathematics Education (V-M2Ed), San Antonio, TX, Information
    April 26-30, 2017, Wed.-Sun. NCME, San Antonio, TX, www.ncme.org
    April 27 - May 1, 2017, Thur.-Mon. AERA, San Antonio, TX, www.aera.net
    May 26 - June 23, 2017, Fri.-Fri. On-line workshop: Practical Rasch Measurement - Core Topics (E. Smith, Winsteps), www.statistics.com
    June 30 - July 29, 2017, Fri.-Fri. On-line workshop: Practical Rasch Measurement - Further Topics (E. Smith, Winsteps), www.statistics.com
    July 31 - Aug. 3, 2017, Mon.-Thurs. Joint IMEKO TC1-TC7-TC13 Symposium 2017: Measurement Science challenges in Natural and Social Sciences, Rio de Janeiro, Brazil, imeko-tc7-rio.org.br
    Aug. 7-9, 2017, Mon-Wed. PROMS 2017: Pacific Rim Objective Measurement Symposium, Sabah, Borneo, Malaysia, proms.promsociety.org/2017/
    Aug. 11 - Sept. 8, 2017, Fri.-Fri. On-line workshop: Many-Facet Rasch Measurement (E. Smith, Facets), www.statistics.com
    Aug. 18-21, 2017, Fri.-Mon. IACAT 2017: International Association for Computerized Adaptive Testing, Niigata, Japan, iacat.org
    Sept. 15-16, 2017, Fri.-Sat. IOMC 2017: International Outcome Measurement Conference, Chicago, jampress.org/iomc2017.htm
    Oct. 13 - Nov. 10, 2017, Fri.-Fri. On-line workshop: Practical Rasch Measurement - Core Topics (E. Smith, Winsteps), www.statistics.com
    Jan. 5 - Feb. 2, 2018, Fri.-Fri. On-line workshop: Practical Rasch Measurement - Core Topics (E. Smith, Winsteps), www.statistics.com
    Jan. 10-16, 2018, Wed.-Tues. In-person workshop: Advanced Course in Rasch Measurement Theory and the application of RUMM2030, Perth, Australia (D. Andrich), Announcement
    Jan. 17-19, 2018, Wed.-Fri. Rasch Conference: Seventh International Conference on Probabilistic Models for Measurement, Matilda Bay Club, Perth, Australia, Website
    May 25 - June 22, 2018, Fri.-Fri. On-line workshop: Practical Rasch Measurement - Core Topics (E. Smith, Winsteps), www.statistics.com
    June 29 - July 27, 2018, Fri.-Fri. On-line workshop: Practical Rasch Measurement - Further Topics (E. Smith, Winsteps), www.statistics.com
    Aug. 10 - Sept. 7, 2018, Fri.-Fri. On-line workshop: Many-Facet Rasch Measurement (E. Smith, Facets), www.statistics.com
    Oct. 12 - Nov. 9, 2018, Fri.-Fri. On-line workshop: Practical Rasch Measurement - Core Topics (E. Smith, Winsteps), www.statistics.com
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