**Basic Idea of Factor Analysis as a Data Reduction Method**

Basic Idea of Factor Analysis as a Data Reduction Method

Combining Two Variables into a Single Factor

Extracting Principal Components

Generalizing to the Case of Multiple Variables

Reviewing the Results of a Principal Components Analysis

**Factor Analysis as a Classification Method**

Factor Analysis as a Classification Method

Interpreting the Factor Structure

**Miscellaneous Other Issues and Statistics**

Reproduced and Residual Correlations

**Specifying the Factor Analysis**

**Define Method of Factor Extraction**

Define Method of Factor Extraction Dialog

**Reviewing Factor Analysis Results**

Factor Analysis Results Dialog

Review Descriptive Statistics Dialog

Multiple Regression Analysis Dialog

Notes and Technical Information

A Note on Box and Whisker Plots

A Note on Matrix Ill-conditioning and the Modified Correlation Matrix