ABSTRACT
This appendix presents implementation of the marginal maximum likelihood estimation using the expectation and maximization algorithm for the Rasch model. All the derivations are based on Thissen (1982). Because the marginal maximum likelihood estimation procedures together with the expectation and maximization algorithm are presented several different places (e.g., Chapters 6,7, 10, and 11), we will describe below the basic equations that are necessary for implementation.
