### COMPARE program information and links

### The
COMPARE program computes measures of factor congruence/similarity for
two sets of factor loadings (typically the factor pattern). These
include Tucker's (1951) coefficient of congruence, root-mean-square
difference measures (see Harman, 1976), and the Cattell-Baggaley
s-index (Cattell & Baggaley, 1960). After the factors are
compared users may optionally rotate them to maximum congruence (Korth
& Tucker, 1976), then recompute the indices.

### Tucker's
congruence measure now seems to be the accepted standard for assessing
factor similarity (Lorenzo-Seva & ten Berge, 2006).

### Citation information:

###
Fleming, J. S. (1991). COMPARE: An interactive program for computing
measures of similarity for factor loadings, with procrustes rotation options. [Computer software]. Available from: http://swppr.org.

### Download information:

###
Download compare.zip file using ftp. It contains two
zipped files: Compare.doc (a "how to" Word document), and the
executable program, compare.exe.

### References:

### Cattell, R. B.,.& Baggaley, A. R. (1960). Thesalient variable similarity index for factor matching. British Journal of Statistical Psychology, 13, 33-46.

### Harman, H. H. (1976). Modern factor analysis (2nd. Ed.). Chicago: University of Chicago Press.

###
Korth, B., & Tucker, L. R (1976). Procrustes matching by congruence
coefficients. Psychometrika, 41, 531-535.

###
Lorenzo-Seva, U., & ten Berge, J. M. F. (2006). Tucker's
coefficient of congruence as a meaningful index of factor similarity. Methodology, 2, 57-64.

### Tucker, L. R (1951). A method for synthesis of factor analysis studies. Personnel Research Section Report No. 984. Washington, D.C.: Department of the Army.