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Mathematical Introduction
The Factor Problem
Fundamental Equations
Geometrical Models
A Factor Problem in Two Dimensions
The Grouping Method of Factoring
Factors as Explanatory Concepts
The Spherical Model
The Centroid Method of Factoring
Configurations and Factor Patterns
Rotation of Axes
The Method of Extended Vectors
The Special Case or Unit Rank
The Unknown Communalities
The Simple Structure Concept
Oblique Structure
Factorial Invariance
Alternative Methods of Rotation
Second-Order Factors
The Effects of Selection
The Principal Ахes
The Appraisal of Individual Abilities