From the Plots menu, the Construct Alley show measures and fit values graphically. They originate in Massof (2005) and are featured in several papers by Leslie Pendrill. For successful operation, Excel must be available on your computer.
To produce these charts, Winsteps writes out the requisite values into a temporary file. Excel is then launched automatically. It reads in the temporary file and follows instructions to create a construct plot. The plot is displayed, and the Excel worksheet becomes available for any alterations that are desired. The Excel worksheet may be made permanent using "Save As". The free Excel Add-in XY Chart Labeler from https://www.appspro.com/Utilities/ChartLabeler.htm is useful if your want to change the point labels.
Selecting "Construct Alley" from the Plots menu:
For instructions about this dialog box, see Bubble Charts
Construct Alley for Example0.txt. The Error Bars are one S.E. above and below the item difficulty.
Massof, R. W. (2005, April). Application of stochastic measurement models to visual function rating scale questionnaires. Ophthalmic Epidemiology, 12(2), 103-124.
