A Similarity-Based Smoothing Approach to Nondimensional Item Analysis
- 1 September 1995
- journal article
- Published by Cambridge University Press (CUP) in Psychometrika
- Vol. 60 (3) , 323-339
- https://doi.org/10.1007/bf02294378
Abstract
The probability that an examinee chooses a particular option within an item is estimated by averaging over the responses to that item of examinees with similar response patterns for the whole test. The approach does not presume any latent variable structure or any dimensionality. But simulated and actual data analyses are presented to show that when the responses are determined by a latent ability variable, this similarity-based smoothing procedure can reveal the dimensionality of ability very satisfactorily.Keywords
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