check_sphericity {performance}

Check model for violation of sphericity

Description

Check model for violation of sphericity. For Bartlett's Test of Sphericity (used for correlation matrices and factor analyses), see check_sphericity_bartlett.

Usage

check_sphericity(x, ...)

Arguments

x

A model object.

...

Arguments passed to car::Anova.

Value

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))