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Direct linkTong, Ye; Kolen, Michael J. – Applied Measurement in Education, 2007
A number of vertical scaling methodologies were examined in this article. Scaling variations included data collection design, scaling method, item response theory (IRT) scoring procedure, and proficiency estimation method. Vertical scales were developed for Grade 3 through Grade 8 for 4 content areas and 9 simulated datasets. A total of 11 scaling…
Descriptors: Achievement Tests, Scaling, Methods, Item Response Theory
