The rasch model, the law of comparative judgment and additive conjoint measurement
- H. E. Brogden
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Relationships between the Rasch model and both the law of comparative judgment and additive conjoint measurement are discussed. The distance between the ability of Persona and the difficult of Itemi is, in the Rasch model, the baseline value corresponding to the probability thata will respond correctly toi, where this probability is interpreted as the area under a logistic curve (which is substantially equivalent to the normal curve) and is thus an application of the law of comparative judgment. Under certain assumptions, the Rasch model is also a special case of additive conjoint measurement and, properly reinterpreted, may be usefully applied in contexts other than individual differences.
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- The rasch model, the law of comparative judgment and additive conjoint measurement
Volume 42, Issue 4 , pp 631-634
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- measurement theory
- Rasch model
- test theory
- inverse logistic
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- H. E. Brogden (1)
- Author Affiliations
- 1. Department of Psychological Sciences, Purdue University, 47907, West Lafayette, Indiana