- Item Response Theory: Analyses and Program testing
- Path Modelling: AMOS and PLSPath
- Educational Achievement: Analyses and Sampling
- Training and Consultation in Statistical Methods
- Research and Development of Educational Statistical Methods
- Planning and Implementation of Computer Programs
In my dissertation I concentrated to a general solution of variance components, which are the basis for the generalisation theory or the generalisation of item tests. Another target of my studies has been path models and, especially, PLSPATH model, in which I was interested in the stability, identifiability of the model and the usefulness of the model for the educational data. In the future, I will concentrate to the Rasch model and it's connections to the generalisation properties. Actually, I have recently published a book "Item analyses in analyzing tests (in Finnish)".
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