Nikoloulopoulos, Aristidis; Joe, Harry - In: Psychometrika 80 (2015) 1, pp. 126-150
Factor or conditional independence models based on copulas are proposed for multivariate discrete data such as item responses. The factor copula models have interpretations of latent maxima/minima (in comparison with latent means) and can lead to more probability in the joint upper or lower tail...