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tramarobin / fctSnPM

Using spm1d package (v.0.4.3), compute anova and post-hoc tests from anova1 to anova3rm, with a non-parametric approach (permutation tests)
GNU General Public License v3.0
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Main Effect interpretation #16

Closed jinhee615 closed 3 years ago

jinhee615 commented 3 years ago

Hello. I have 3x3 Group x Condition design with two way repeated measures.

two way ANOVA revealed Condition main effect, and Post hoc was conducted. There is a condition main effect, however, No t-test significance are shown like image below.

image

How Can I interpret it? what kind of main effect it is, and Which condition exhibited main effect?

tramarobin commented 3 years ago

There is potentially a Condition effect, however, the post hoc test is not powerful enough to detect significant changes in conditions.

jinhee615 commented 3 years ago

Does fctSPM post-hoc ttest use Bonferroni correction?

tramarobin commented 3 years ago

Yes it does.

spmAnalysis.posthoc.tTests.pBonferroni is the alpha risk choosen for the post hoc tests after Bonferroni correction.

jinhee615 commented 3 years ago

Thank You so much!