Download Noharm 4.0 from our website for free. The most popular versions among the software users are 4.0 and 1.0. This free program is a product of Colin Fraser & R.P. McDonald. The software lies within Education Tools, more precisely Science Tools. Commonly, this program's installer has the following filename: Noharm4.exe.
From the developer:
Noharm is a program designed for fitting both unidimensional and multidimensional normal ogive models of latent trait theory. The program computes and prints out the residual covariances of the items, after fitting the model, and gives the root mean square of these as an overall measure of misfit of the model to the data, with the given number of dimensions and the given pattern of the coefficient matrix.
You may want to check out more software, such as Trachtenberg Speed Math, SatCalc or MathMatic, which might be related to Noharm.