[Eeglablist] ANOVA and Bonferroni_eeglab vs. SPSS

[Makoto Miyakoshi]

Dear Johanna,

> Does eeglab use the same computation of ANOVA and Bonferroni-correction
like SPSS does?

EEGLAB uses statcond() for parametric (t-test and ANOVA) and non-parametric
(permutation, bootstrap). For multiple comparison correction, it has fdr()
and bonf_holm(). I don't use SPSS but the algorithm should be the same.
However, as far as I know, EEGLAB's ANOVA may have limitation in mixed
design i.e., mixture of repeated and non-repeated measures.

> For clearer understanding here a short overview of my study design:
There were 4 conditions and 2 testing times (pretest and posttest) with 19
electrodes. I computed a pairwise comparison between the conditions and the
testing times. There were significant differences between the conditions in
SPSS, but not so in eeglab.

Oh boy, this is not cleaner to me unfortunately!
Did you perform ANOVA, or what? If your 4x2 factorial deisgn mixed design?
Also, what did you test? Mean amplitude of a window, or what? Give me more
info and I may be able to help you.

Makoto


On Fri, Jul 6, 2018 at 10:33 AM Wind, Johanna <jwind01 at uni-mainz.de> wrote:

>
>
> Hello everybody,
>
>
>
> I‘ve got a question in relation to the eeglab output. Does eeglab use the
> same computation of ANOVA and Bonferroni-correction like SPSS does? When I
> transfer the specdata from eeglab to SPSS and compute an ANOVA with post
> hoc tests in order to get pairwise comparisons between my conditions, there
> were given significant differences. But in the pairwise comparison of the
> conditions in eeglab are not all electrodes significant like shown in SPSS.
>
>
>
> For clearer understanding here a short overview of my study design:
>
> There were 4 conditions and 2 testing times (pretest and posttest) with 19
> electrodes. I computed a pairwise comparison between the conditions and the
> testing times. There were significant differences between the conditions in
> SPSS, but not so in eeglab.
>
>
>
>
>
>
>
> It would be awesome, if you can reply my questions.
>
>
>
>
>
> Best regards,
>
>
>
> Johanna Wind
>
> wissenschaftliche Mitarbeiterin
>
> Johannes Gutenberg-Universität Mainz
>
> Institut für Sportwissenschaft
>
> Abt. Trainings- und Bewegungswissenschaften
>
> Raum: 00-113
>
> Tel.: 06131-24560
>
> Albert Schweitzer-Straße 22
>
> E-Mail: jwind01 at uni-mainz.de
>
> Sprechstunde nach Vereinbarung
>
>
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-- 
Makoto Miyakoshi
Swartz Center for Computational Neuroscience
Institute for Neural Computation, University of California San Diego
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