Бифакторни и IRT модели на Епидемиологична скала за депресия: мултидименсионални подходи в психометричния анализ на един инструмент
Bifactor and IRT models of CES-D: Multidimensional approaches in psychometric analysis of an inventory

Summary/Abstract: The present research of the CES-D’s latent structure in a Bulgarian sample follows two lines of methodology. The first one is the bifactor confirmatory modeling, which integrates the facet structure of the scale with a general factor, implied by the generic scale’s construct and thus locates the instrument in between one-dimensional and multidimensional alternatives in its interpretation. The second line advances further the achieved results from bifactor analyses embedding the facet structure of the CES-D in the framework of multidimensional IRT methodology. The basic parameters of MIRT and their statistical and psychometric backgrounds are pinpointed and explained. The analyses included in the text have rather didactic emphasis as the insufficient sample size limits the results obtained as preliminary and inconclusive.

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