# 12.13 - Summary

12.13 - SummaryIn this lesson we learned about:

- The interpretation of factor loadings;
- The principal component and maximum likelihood methods for estimating factor loadings and specific variances
- How communalities can be used to assess the adequacy of a factor model
- A likelihood ratio test for the goodness-of-fit of a factor model
- Factor rotation
- Methods for estimating common factors