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Download full textChoppin, Bruce – 1982
A strategy for overcoming problems with the Rasch model's inability to handle missing data involves a pairwise algorithm which manipulates the data matrix to separate out the information needed for the estimation of item difficulty parameters in a test. The method of estimation compares two or three items at a time, separating out the ability…
Descriptors: Difficulty Level, Estimation (Mathematics), Goodness of Fit, Item Analysis
