Check model for homogeneity of variancesSource:
Check model for homogeneity of variances between groups described by independent variables in a model.
check_homogeneity(x, method = c("bartlett", "fligner", "levene", "auto"), ...) # S3 method for afex_aov check_homogeneity(x, method = "levene", ...)
A linear model or an ANOVA object.
Name of the method (underlying test) that should be performed to check the homogeneity of variances. May either be
"levene"for Levene's Test for Homogeneity of Variance,
"bartlett"for the Bartlett test (assuming normal distributed samples or groups),
"fligner"for the Fligner-Killeen test (rank-based, non-parametric test), or
"auto". In the latter case, Bartlett test is used if the model response is normal distributed, else Fligner-Killeen test is used.
Arguments passed down to
Invisibly returns the p-value of the test statistics. A p-value < 0.05 indicates a significant difference in the variance between the groups.