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Screensize: 640 x 480 800 x 600 1024 x 768 1280 x 1024 UserName: Password: Anti-Spam Code: Format Mode: Basic  Help  Prompt  Format: Font Andale Mono Arial Arial Black Book Antiqua Century Gothic Comic Sans MS Courier New Georgia Impact Lucida Console Script MT Bold Stencil Tahoma Times New Roman Trebuchet MS Verdana   Size 1 2 3 4 5 6   Color Black Red Yellow Pink Green Orange Purple Blue Beige Brown Teal Navy Maroon LimeGreen Message: * HTML is OFF * Forum Code is ON Smilies [quote][i]Originally posted by Tryphon[/i] [br]Hello, I am confused on the result interpretation after execution of the Two-way ANOVA repeated measures process on my data. Let me expose the context. I use the factors Time and Genotype to explain the response in my experiment. The Time factor is a repetition factor (4 levels) related to the repeated measures of the response. The Genotype factor is not a repetition factor (2 levels). I use Indexed input data, Significance Level = 0.05 and I ask for Interaction computation and Means Comparison using Holm-Bonferoni method. Now I am trying to understand the worksheet results I get reading in parallel the example found there : https://www.originlab.com/doc/Tutorials/2WayRepeatedMeasuresANOVA In the [i]Multivariate Tests table[/i] I see only the rows Time and Time*Genotype which is okay for me since I have only one repetition factor (Time). In the [i]Mauchly's Test of Sphericity table[/i] I get only one row named Time. [b]Question 1[/b] : Why I cannot see the Time*Genotype row? In the [i]Tests of Within-Subjects Effects table[/i] I see 3 rows : Time, Time*Genotype and Error(Time). [b]Question 2[/b] : How to choose the right correction for sphericity violation since I did not get the Mauchly's test for Time*Genotype ? Anyway, all the corrections presented in the Tests of Within-Subjects Effects table shows a [u]non significant[/u] Time*Genotype interaction (for my data). In the [i]Tests of Between-Subjects Effects table[/i], I see the Genotype row which indicates a [u]significant difference[/u] between the two genotype levels. At the end I see 3 tables : [i]Time/Pairwise Comparison[/i], [i]Genotype/Pairwise Comparison[/i] and [i]Time*Genotype/Pairwise Comparison[/i] which are all populated. For the first two Comparison tables (main effects), all combinations are significant and this is okay in my study. However, post-hoc test results for Genotype within Times are not presented and I expected them in this table since I got Time*Genotype interaction not significant. [b]Question 3[/b]: Why post-hoc test results for Genotype within Times are not computed? [b]Question 4[/b] : Could you explain why the Time*Genotype/Pairwise Comparison table is populated since the Time*Genotype interaction was found not significant? In this situation, what is the meaning of the post-hoc tests showed there? Now comes the Holm-Bonferoni test results for Genotype within Time (4 levels)in the Time*Genotype/Pairwise Comparison table. I tested many set of data which show no significant interaction. For some data sets, the Alpha column shows values less than the signicant level I choose (0.05) and this is okay to manage errors of type I. But for other data sets, Alpha is exactly 0.05 at all Times which is not expected according to the Holm-Bonferoni method (as far as I know). I saw this strange behavior with the Bonferoni method also. [b]Question 5[/b] : Could you explain why this happens sometimes ? Thank you. Origin 2018b (64 bits) b9.5.5.409 Operating System: Windows 8.1 64 bits [/quote]   Check here to include your profile signature. Check here to subscribe to this topic.