**How is indeterminacy assessed and how are factor
score estimates evaluated?**

The SAS IML programs on the main
page provide the means for evaluating the degree of factor score indeterminacy
in the results of a common factor analysis. These programs are described
and discussed in Grice (2001; *Computing
and evaluating factor scores. In press, Psychological Methods.*).
Any type of exploratory factor analysis conducted by SAS, using any type
of rotation, and specifying any number of factors to extract can be evaluated
by the programs. They can also be used to help researchers select from
the different methods of estimating factor scores and to evaluate the estimates
once they have been calculated. Both refined (exact, complex) and
coarse (inexact, unit-weighted) factor score estimates can be computed
and evaluated. Annotated examples for each program as well as annotated
output are provided.

Unfortunately, SPSS’s Matrix routine
and general program structure is too limited to write similar scripts for
this software. The reader is referred to Gorsuch ‘s __Factor Analysis__
text (1983), page 273, for the formulas needed to evaluate factor score
estimates and to Guttman's (1955) classic paper for the formulas needed
to compute the degree of determinacy in the common factors.