getVCOV function

Obtain the asymptotic covariance matrix

This function can be used to obtain the estimated asymptotic covariance matrix from a psychonetrics object.

getVCOV(model, approximate_SEs = FALSE)

Arguments

• model: A psychonetrics model.
• approximate_SEs: Logical, should standard errors be approximated? If true, an approximate matrix inverse of the Fischer information is used to obtain the standard errors.

Returns

This function returns a matrix.

Author(s)

Sacha Epskamp