Chapter 7

Comparing more than two means

One factor ANOVA with a within-subject design


This chapter extends the material in Chapter 6 to the case in which you do not have independent samples. Rather, you have one group of respondents that complete the same tasks, rate the same features for ease of use, or a variety of other measures. The idea in this chapter is similar to that of Chapter 3 when we had two designs or tasks and discussed “paired data.” That meant that the same person saw both designs or performed both tasks. When the same person is involved in each column's data value (i.e., a complete row of data is from the same person), the fancy term that is used is “repeated measures.” Perhaps a more common expression in some fields is ...

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