Exercises

  1. Replicate the analyses reported in the chapter with the engineering, SDQ, or GDS data. Specifically:
    1. Examine the factor loading plot prior to rotation (if you examine the factor loading plot for the GDS, it will be a three-dimensional plot that is more complex to interpret) and again after trying various rotation strategies. Which do you think provides the best clarification of the result?
    2. For the GDS data, examine a three-factor solution to see whether it is more sensible than the one-, five-, or eight-factor solutions that are described in the chapter. Do the factors make sense? If so, describe what each latent variable is measuring.
  2. Using the identification with academics data downloaded in Chapter 2, conduct and interpret the results of an EFA. Specifically:
    1. Determine whether an orthogonal or oblique rotation method should be used with the data and be able to explain why.
    2. Compare a few different rotation methods and determine which method provides the best clarification of the results.
    3. Interpret the rotated results.
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