1．THE SCOPE OF FACTOR ANALYSIS 1
2．ESTIMATING FACTOR LOADINGS BY THE METHOD OF MAXIMUM LIKELIHOOD 10
3．THE CENTROID METHOD 28
4．THE METHOD OF PRINCIPAL COMPONENTS 45
5．FACTOR ROTATION AND INTERPRETATION 55
6．ESTIMATION OF FACTOR LOADINGS UNDER VARIOUS INITIAL ASSUMPTIONS 73
7．THE ESTIMATION OF FACTOR SCORES 88
8．IDENTIFYING FACTORS IN DIFFERENT POPULATIONS 92
APPENDIX 102