15 citations · 16 across the 5 of their papers we have counts for
5 papers
Hidden Markov Models for Longitudinal Rating Data with Dynamic Response Styles
R. Colombi, S. Giordano, M. Kateri
This work deals with the analysis of longitudinal ordinal responses. The novelty of the proposed approach is in modeling simultaneously the temporal dynamics of a latent trait of i…
Modelling Ordinal Responses with Uncertainty: a Hierarchical Marginal Model with Latent Uncertainty components
Roberto Colombi, Sabrina Giordano, Anna Gottard +1
In responding to rating questions, an individual may give answers either according to his/her knowledge/awareness or to his/her level of indecision/uncertainty, typically driven by…
Testing order restrictions in contingency tables
Roberto Colombi, Antonio Forcina
Several interesting models for contingency tables are defined by a system of equality and inequality constraints on a suitable set of marginal log-linear parameters. After reviewin…
Multiple Hidden Markov Models for Categorical Time Series
Roberto Colombi, Sabrina Giordano
We introduce multiple hidden Markov models (MHMMs) where an observed multivariate categorical time series depends on an unobservable multivariate Mar- kov chain. MHMMs provide an e…
A class of smooth models satisfying marginal and context specific conditional independencies
R. Colombi, A. Forcina
We study a class of conditional independence models for discrete data with the property that one or more log-linear interactions are defined within two different marginal distribut…