AN ANALYSIS OF CATEGORICAL REPEATED MEASUREMENTS IN THE PRESENCE OF AN EXTERNAL FACTOR

This paper provides a log-linear method for the analysis of contingenc y tables where the population of individuals is divided into distinct subpopulations and where repeated measurements are made on each indivi dual. The proposed model for the full joint probabilities is quasi-sym metry within each subpopulation; the model is derived from one of two within-individual models. The method by which the hypotheses that flow from the model are tested is an extension of the test of marginal sym metry, achieved by testing complete symmetry conditional on quasi-symm etry.