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Parallel Optimal Calibration of Mixed-Format Items for Achievement Tests.

Frank Miller1,2, Ellinor Fackle-Fornius1

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Summary
This summary is machine-generated.

This study introduces an optimal calibration design for parallel testing, improving item calibration efficiency in large-scale achievement tests. The method enhances accuracy for mixed-format tests with varied response times.

Keywords:
Achievement testsCalibrationMixed-format itemsOptimal designSwedish national test

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Area of Science:

  • Educational Measurement
  • Psychometrics
  • Test Theory

Background:

  • Large-scale achievement tests require regular item calibration for operational use.
  • Existing optimal assignment methods primarily address sequential examinee arrivals.
  • Simultaneous or parallel test administration is common in calibration settings.

Purpose of the Study:

  • To develop an optimal calibration design for parallel test setups.
  • To investigate the efficiency gains of the proposed method.
  • To demonstrate the method's applicability in real-world calibration scenarios.

Main Methods:

  • Developed an optimal calibration design tailored for parallel test administration.
  • The method handles mixed-format items and accounts for varying expected response times.
  • Applied the method to calibrate items for Swedish national mathematics tests.

Main Results:

  • The proposed method significantly enhances calibration efficiency.
  • Demonstrated successful implementation in a real-world case study.
  • The design is effective for mixed-format tests with diverse response time expectations.

Conclusions:

  • The new optimal calibration design is efficient and practical for parallel test setups.
  • This method offers substantial improvements for calibrating items in large-scale assessments.
  • The approach is suitable for mixed-format tests, addressing practical challenges in educational measurement.