check_sphericity function

Check model for violation of sphericity

Check model for violation of sphericity. For Bartlett's Test of Sphericity

(used for correlation matrices and factor analyses), see check_sphericity_bartlett .

check_sphericity(x, ...)

Arguments

• x: A model object.
• ...: Arguments passed to car::Anova.

Returns

Invisibly returns the p-values of the test statistics. A p-value < 0.05 indicates a violation of sphericity.

Examples

data(Soils, package = "carData")
soils.mod <- lm(
  cbind(pH, N, Dens, P, Ca, Mg, K, Na, Conduc) ~ Block + Contour * Depth,
  data = Soils
)

check_sphericity(Manova(soils.mod))