Longitudinal survey data may comprise ordinal polytomous repeated observations and a set of multidimensional covariates for a large number of individuals. One of the main goals of the longitudinal ...

Existing methods for the analysis of clustered, ordinal data are inappropriate for certain applications. We propose latent variable models for clustered ordinal data which are derived as natural ...

One of the simplest ways for readers of the scientific literature to understand statistical methodology is to start with the data used in a study. The nature of the data typically determines which ...

1. What does it mean to say that a measure has a PRE interpretation? It means that the measure can be interpreted in a way that tells you the percentage reduction in errors you would make when ...