General Linear Models: Two-Way ANOVA

The three ANOVA chapters in this book (Chapters 12, 13, and 14) should be read sequentially. A thorough grasp of one-way ANOVA (Chapter 12) is necessary before two-way ANOVA (this chapter) can be understood. This paves the way for Chapter 14 that considers three-way ANOVA and the influence of covariates. The present chapter is (intentionally) the simplest of the three; it includes a simple two-factor hierarchical design and nothing more. Yet understanding this chapter will provide the foundation for the considerably more complex Chapter 14. ANOVA is an involved process, and even in Chapter 14 we do not consider all the options that SPSS provides. Please refer to the IBM SPSS Statistics 19 Guide to Data Analysis for a more complete description of additional choices.