抄録
In this article, the author discusses statistical problems associated with the factor analysis of categorical data in the general context of the latent variable model. Modelling process for categorical data and the estimation procedure for the parameters of the model are discussed. Also, it is argued that the usefulness of these models as item response models can be tested in the area of educational measurement. Finally, the problems which remain unsolved are discussed and the future directions of the latent variable model are suggested.
