A note on the geometric interpretation of the EM algorithm in estimating item characteristics and student abilities |
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Authors: | Edward H Ip Neal Lalwania |
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Institution: | (1) Information and Operations Management Department, Marshall School of Business, University of Southern California, 90089 Los Angeles, CA |
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Abstract: | This note uses the EM-algorithm in an item response model as an illustration of a general method of parameter estimation,
which geometrically can be described as an alternating projection method.
The research was initiated by a series of lectures on alternating projection methods given by Imre Csiszar in 1993 at Stanford
University where the first author was a graduate student. |
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Keywords: | alternating projection |
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