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Download full textvon Davier, Alina A. – ETS Research Report Series, 2012
Maintaining comparability of test scores is a major challenge faced by testing programs that have almost continuous administrations. Among the potential problems are scale drift and rapid accumulation of errors. Many standard quality control techniques for testing programs, which can effectively detect and address scale drift for small numbers of…
Descriptors: Quality Control, Data Analysis, Trend Analysis, Scaling
