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Incomplete results produced? Simple main effects of significant 3-factor interaction found in repeated repeated measures ANOVA

  • 1.  Incomplete results produced? Simple main effects of significant 3-factor interaction found in repeated repeated measures ANOVA

    Posted Tue March 21, 2023 07:20 PM
      |   view attached

    Hi All,

    I ran a repeated measures ANOVA on my dataset of 101 participants with the following factors:

    between-subject factor: group (2 levels)

    within-subject factors: timewindow (2 levels), conditions (3 levels), and electrodes (25 levels)

    I do the repeated measures ANOVA and I see that timewindow x conditions x electrodes interaction is significant.

    Now, I want to look at the simple main effects of conditions at the level of each time window and electrodes.

    so, in the syntax, i add the compare function:  /EMMEANS=TABLES(timewindow*conditions*electrodes) COMPARE(conditions) ADJ(LSD)

    I get the desired pairwise comparisons of the conditions for each of the 25 electrodes for the two time windows separately.

    But the multivariate -tests table is generated only for the first time window and not for the second time-window!

    Is this a bug or am I doing something wrong?

    Please find attached the multivariate test for the first timewindow.

    Thanks,

    S



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    Sujata S
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