SIMPLE MAIN EFFECTS
Click [http://ssc.utexas.edu/software/faqs/spss#SPSS_35 here]
to find out how to use EMMEANS in GLM to test simple main effects. You can additionally also add ADJ(BONFERRONI) or ADJ(SIDAK) to the /EMMEANS subcommand line to correct for multiple t-tests and use /EMMEANS for designs involving only between subjects factors (see some examples [http://old.nabble.com/2-way-ANOVA-td26444614.html here]).
Simple effects involving between subject factors can also be specified in SPSS using the [attachment:lmatrix.pdf /LMATRIX subcommand] and the /MMATRIX subcommand for within subjects factors or [http://listserv.uga.edu/cgi-bin/wa?A2=ind0107&L=spssx-l&P=13210 combinations of the two]. [http://www.nicholasgibson.com/lmatrix.html See also.]
See the [http://imaging.mrc-cbu.cam.ac.uk/statswiki/StatsCourse2006 ANOVA Grad talk for examples] and [attachment:lmat.sps some SPSS syntax for two-way interactions.]
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[http://www.mrc-cbu.cam.ac.uk/ Return to CBU main page]
These pages are maintained by [mailto:ian.nimmo-smith@mrc-cbu.cam.ac.uk Ian Nimmo-Smith] and [mailto:peter.watson@mrc-cbu.cam.ac.uk Peter Watson]
[Last updated on 14 April, 2004]