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FIGURE 7.4
One-factor within-subject ANOVA setup for illustrative example; SPSS.
same as each other person (although this might be true!!); it indicates, rather, that aver-
aged across all four tasks , the respondents cannot be said to be different in their ratings
of the tasks. This is likely a good thing (albeit, perhaps not critical), but it suggests that
the group of respondents is somewhat homogeneous with respect to their ratings.
7.6 NEWMAN-KEULS ANALYSIS
Now that we have concluded that the ease-of-use averages are not the same for the
four tasks, it is logical to examine the results of the Newman-Keuls (S-N-K) test,
covered in the previous chapter (Chapter 6). The results are displayed in Figure 7.7 .
A fast review of how to conduct the S-N-K test: if you go back to Figure 7.4 and
click on “ post hoc ” (see bent arrow in Figure 7.4 ), and then click “OK,” you get what
is shown in Figure 7.6 .
In Figure 7.6 , three things were done. First, the factor “Task” was brought over
to the right box by highlighting it and clicking on the SPSS arrow, which would
be pointing to the right at that point (see horizontal arrow). Second, the “S-N-K”
 
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