Which correction method could be ideal (Greenhouse -Geisser or Huynh-Feldt), if the data did not meet the assumption of sphericity.
Hi Yang Li thanks for your reply. I think, the Green house - Geisser is the opt one, if the data did not meet the assumption of sphericity. I need some informations and criteria for the correction method that could be helpful for further analysis.
You had better use a mixed model instead of RMANOVA.
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