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R code for analyzing data from tests and rating scales.
January 9, 2024 A major cleanup of the code was required to solve the issue that the plot of the last item was greatly distorted.
March 15, 2024 A number of bugs fixed.
September 16, 2024 Bspline basis functions will return values of 0 if the order of the spline is equal to the number of basis functions. This is especially helpful for the elementary two-basis case that is the spline basis version of the classic nominal model used by Darrell Bock for modelling multi-option tests and rating scales.
These binaries (installable software) and packages are in development.
They may not be fully stable and should be used with caution. We make no claims about them.
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