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I am doing a two-way independent ANOVA using type of organisational change (5 levels) and job level (7 levels) within the organisation as the factors (in SPSS). I followed Andy Field's procedure (Discovering Statistics Using SPSS, third edition) and I cannot manage to get the option of Post-Hoc tests for cases where equal variance is not assumed, i.e. Games-Howell.

I searched the syntax help files and somewhere there's a note saying that when using more than one factor Games-Howell cannot be performed. However, Andy Field did it! (please see page 434 of his book). Any ideas how can I do the same?

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  • $\begingroup$ In the options of Post-Hoc, down there are some options that you can selected as Games-Howell. $\endgroup$ – user42522 Mar 25 '14 at 14:44
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I'm not sure whether there's a better way but perhaps you can run one-way anovas on factor 1 for each category group of factor 2 separately?

You would use split files ... for this.

Try it and see whether that duplicates Andy's results.

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  • $\begingroup$ I see what you mean, the only thing I can think of is that Andy had one factor (gender) with only two categories. $\endgroup$ – errante Oct 3 '13 at 15:32

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