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eta_squared(car::Anova(m, type = 2), partial = FALSE)
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eta_squared(car::Anova(m, type = 3)) # partial = TRUE by default
@@ -138,7 +144,7 @@ for factors this can be done by using orthogonal coding (such as `contr.sum` for
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This unfortunately makes parameter interpretation harder, but *only* when this is does do the *SS*s associated with each lower-order term (or lower-order interaction) represent the ***SS*** of the **main effect** (with treatment coding they represent the *SS* of the simple effects).
m_interaction1 <- lm(value ~ treatment * gender, data = obk.long)
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@@ -233,12 +239,7 @@ always the case.
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For example, in linear mixed models (LMM/HLM/MLM), the estimation of all required *SS*s is not straightforward. However, we can still *approximate* these effect sizes (only their partial versions) based on the **test-statistic approximation method** (learn more in the [*Effect Size from Test Statistics* vignette](https://easystats.github.io/effectsize/articles/from_test_statistics.html)).
The `effectsize` package contains function to convert among indices of effect
@@ -48,7 +53,7 @@ cohens_d(salary ~ is_senior, data = hardlyworking)
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But we can also compute a point-biserial correlation, which is Pearson's *r* when treating the 2-level `is_senior` variable as a numeric binary variable:
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