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Vertical Scaling

Vertical scaling places tests written for different grade levels onto a single continuous score scale so that growth from one grade to the next can be measured in common units. Unlike horizontal equating, which links alternate forms intended to be interchangeable, vertical scaling deliberately links tests of differing difficulty and content to build a developmental continuum spanning, for example, grades 3 through 8. It is the measurement foundation that lets a fourth-grade and a fifth-grade score be subtracted to express how much a student grew.

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Vertical Scaling of Achievement Tests Across Grades

Dossier de méthode taxonomique · latent-structure / education

Kolen, M. J., & Brennan, R. L. (2014). Test Equating, Scaling, and Linking: Methods and Practices (3rd ed.). Springer. · ISBN 9781493903160
Yen, W. M., & Fitzpatrick, A. R. (2006). Item Response Theory. In R. L. Brennan (Ed.), Educational Measurement (4th ed., pp. 111–153). American Council on Education / Praeger. · ISBN 9780275981259

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Méthodes apparentées

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Used in the same domainEducational Growth Curve Modelingmachine-suggested · Relational suggestion, not evidence.Same method familyItem Response Theorymachine-suggested · Relational suggestion, not evidence.Used in the same domainStudent Growth Percentilesmachine-suggested · Relational suggestion, not evidence.Same method familyTest Equatingmachine-suggested · Relational suggestion, not evidence.