Parameter Estimation for Finite Mixtures of Partial Credit Models


Цветков, Димитър (2007) Parameter Estimation for Finite Mixtures of Partial Credit Models In Proceedings of the 2007 international conference on Computer systems and technologies (CompSysTech '07), Boris Rachev, Angel Smrikarov, and Dimo Dimov (Eds.). ACM, New York, NY, USA, Article 62, 6 pages. ISBN: 978-954-9641-50-9


 We consider a test of finite length and assume that each item has graded response categories which satisfy the Generalized Partial Credit Model (GPCM) from the Item Response Theory [1-5] and also that there exist population classes. We give a parameter estimation procedure for this finite GPCM mixture, based on the EM algorithm and test the model with simulated data. The paper contains complete (and formal alternative from [3]) derivation of the basic model formulas.
  Статия
 Item Response Theory, Generalized Partial Credit Model, EM algorithm.


Природни науки, математика и информатика Математика
Природни науки, математика и информатика Информатика и компютърни науки

Natural sciences, mathematics and informatics Mathematics
Natural sciences, mathematics and informatics Informatics and Computer Science

 Издадено
  4745
 Димитър Цветков

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