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Measurement Techniques2
Models2
Social Science Research2
Statistical Analysis2
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Psychometrika2
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Andrich, David1
Roskam, Edward E.1
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Graded Responses and Joining Categories: A Rejoinder to Andrich'"Models for Measurement, Precision, and Nondichotomization of Graded Responses."
Peer reviewed Peer reviewed
Roskam, Edward E. – Psychometrika, 1995
The Jansen and Roskam (1986) approach to joining categories of graded responses presents valid arguments that are subject to empirical test. The multiplicative Poisson (MPM) model of D. Andrich can be seen as an approximation to the continuous response model of Muller (1987). An extension of the MPM is suggested. (SLD)
Descriptors: Measurement Techniques, Models, Social Science Research, Statistical Analysis
Further Remarks on Nondichotomization of Graded Responses.
Peer reviewed Peer reviewed
Andrich, David – Psychometrika, 1995
These further remarks on the nondichotomization of graded responses attempt to clarify the differences in perspective between the two previous articles. The special case of the multiplicative Poisson model reveals why the joining assumption and dichotomization are not, in general, properties of the unidimensional Rasch model. (SLD)
Descriptors: Measurement Techniques, Models, Social Science Research, Statistical Analysis