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The basic idea is to treat the individual's location on the (latent) proficiency scale as missing data.
Criteria of interest are the reliability of the proficiency scale and the validity of test score interpretation.
The first is intended to satisfy the design criterion of construct representation and the second the criterion of reasonably accurate measurement all along the proficiency scale.
Benchmark samples at each of the levels on the proficiency scale will be selected through standard-setting from performances on assessments aligned to the new framework.
For each of the four NAEP data sets, we computed the item-fit residuals at 31 equally-spaced values of the proficiency scale between −3 and 3 for each score category (except for the lowest score category) of each item.
As a result, employing IRT and using all the data generated by the administration, it is possible to construct a single proficiency scale on which test performance can be represented.
Similar(50)
The authors give a very brief account of the growing number of proficiency scales around the world, while pointing out that China does not have nationwide proficiency scales.
Using a sample of 2345 students, we modelled the structure of competencies and conducted proficiency scaling.
A meta-study was then conducted to analyze reading proficiency scales and relevant literature.
The proficiency scaling was conducted subsequent to Hartig (2007) for a uni-dimensional model; it was not possible to implement proficiency scaling for a multi-dimensional model because of the relatively small number of items.
Results on the structure of competencies and the proficiency scaling of the physical-technical prior competency are first presented.
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CEO of Professional Science Editing for Scientists @ prosciediting.com