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Our research staff is committed to maintaining the highest standards in developing and publishing assessments that serve the needs of every educator and student.

Featured Research Topics


The study of the theory and methodology of educational and psychological measurement.

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Test Development

Valid and reliable assessments result from systematic development by content experts and psychometricians.

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Students with Disabilities

Valid, reliable measurement requires special consideration during test development & administration.

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National Policy

Federal policy has far-reaching impacts on educational measurement and state accountability systems.

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Case Studies

Our metrics-driven case studies share customers' experiences with our solutions.

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Featured Researcher


Dr. Seung Choi

Dr. Choi oversees the Psychometric Services Department composed of researchers of diverse expertise for developing nationally standardized assessments, and psychometric solutions and services, to state and local education agencies.

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Understanding Assessment


The Learning Cycle

DRC|CTB supports educators and students
throughout the learning process.

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