In the IRT person-fluctuation model, the individual trait levels fluctuate within a single test administration whereas the items have fixed locations. This article studies the relations between the person and item parameters of this model and two central ...
This study develops a general linear model intended for personality and attitude items with (approximately) continuous responses that is based on a double source of measurement error: items and persons. Two restricted sub-models are then obtained from the ...
Abstract. In previous research Spearman’s factor-analytic (FA) model has been formulated as a linear Item Response Theory (IRT) model for (approximately) continuous item responses. Furthermore, some generalized IRT-based indices have been ...