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Outline of Talk: "Intuitive" Factor Analysis
  1. Principal components analysis and factor analysis
  2. Creating known data to learn a method: 100 rectangles
  3. The correlation matrix for measures of 100 rectangles
  4. The principal components of 100 rectangles
  5. A plot of the unrotated factors
  6. Rotating factors--explaining a difficult concept
  7. A problem using political data: feeling thermometers in election studies
  8. Principal components analysis of feelings toward candidates in 1992
  9. Unrotated and rotated factors from the factor analysis