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Guangming Li; Zhengyan Liang – SAGE Open, 2024
In order to investigate the influence of separation of grade distributions and ratio of common items on the precision of vertical scaling, this simulation study chooses common item design and first grade as base grade. There are four grades with 1,000 students each to take part in a test which has 100 items. Monte Carlo simulation method is used…
Descriptors: Elementary School Students, Grade 1, Grade 2, Grade 3