Effect size measure from 3dLME


Is it possible to calculate an effect size akin to eta squared from the output of 3dLME?

Thank you,


I’m not aware of an approach to computing eta-squared under the LME framework. On other other hand, would the effect magnitude itself (estimated by 3dLME) be much better than the dimensionless value of eta-squared? At least effect magnitude carries physical meaning and can be directly interpreted.

Thank you for the reply. To clarify, when you refer to effect magnitude, are you referring to the F value that is the default output?

I was referring to simple effects such as contrasts. F-statistic is omnibus and is usually for composite effects, which need to be further partitioned anyway.