Within SAM , a program called SAMITPRO was developed
that can do an Analysis of Variance
(ANOVA), cf. Chapter 9, on the
test results scored by SAM_SCORE . The technique used is
called ``iterative proportional fitting''. The goodness of the fit is expressed
by Pearson's 
. The input of the analysis program is DBMS
format. For availability, see Appendix E.
Based on the confusion matrix, a multidimensional scaling analysis can
be performed. For this purpose, the confusion matrix has to be
transformed to a symmetric matrix (i.e. 
), and
analysed by multidimensional scaling analysis (HDSCAL ) such as
developed by [Carroll & Chang (1970)]. Examples of this
procedure can be found in [Steeneken (1989)].