SPSS for PCA/FA
- Analysis – Data Reduction – Factor
- Under Extraction, choose the options for Principle Components, Eigenvalues over 1, Display unrotated and screen plot.
- Note that there is an option for Number of Factors. There are times you may want to impose a number rather than letting SPSS decide for you.
- For Rotation, choose Varimax (variance maximization ; it’s the most commontly used), and Display Rotated Solution.
- For scores, you will want to select save as variable/regression when you find your solution. But not while in the exploration phase.