Isotonic probabilistic ordinal models


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Documentation for package ‘ISOP’ version 1.0

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isop-package An implementation of the ISOP model proposed by Scheiblechner (see references)
isop An implementation of the ISOP model proposed by Scheiblechner (see references)
isop.asmatrix Convert list of vectors to matrix
isop.calc1set ISOP model for one set of items
isop.calc2set ISOP model for two sets of items
isop.plot2d Plots a set of item characteristic curves
isop.plot3d Generates 3D-Plot of underlying system characteristics table
isop.plotFreqs Plots frequencies of response vectors in system characteristics
isop.sysch Generates a table of system charactics proposed by Scheiblechner (1995, 2003)
isop.testItems Item selection
matrix Convert list of vectors to matrix