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Direct linkSoland, James – Applied Measurement in Education, 2017
Research shows that assuming a test scale is equal-interval can be problematic, especially when the assessment is being used to achieve a policy aim like evaluating growth over time. However, little research considers whether teacher value added is sensitive to the underlying test scale, and in particular whether treating an ordinal scale as…
Descriptors: Intervals, Value Added Models, Teacher Evaluation, Teacher Effectiveness
