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

Frank Miller1,2, Ellinor Fackle-Fornius3

  • 1Department of Statistics, Stockholm University, 10691, Stockholm, Sweden. frank.miller@stat.su.se.

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Summary
This summary is machine-generated.

This study introduces an optimal calibration design for parallel testing, enhancing efficiency in large-scale achievement tests. The method effectively calibrates mixed-format items, improving accuracy in educational assessments.

Keywords:
Achievement testsCalibrationMixed-format itemsOptimal designSwedish national test

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Area of Science:

  • Educational Measurement
  • Psychometrics
  • Applied Statistics

Background:

  • Large-scale achievement tests require item calibration before operational use.
  • Existing calibration methods often assume sequential examinee arrival.
  • Simultaneous or parallel test administration is common in many calibration scenarios.

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 practical implementation of the method in real-world calibration.

Main Methods:

  • Development of an optimal calibration design for parallel test administration.
  • Inclusion of mixed-format item handling.
  • Accounting for varying expected response times.

Main Results:

  • The proposed method significantly enhances calibration efficiency.
  • The method is suitable for mixed-format tests.
  • Demonstrated successful implementation in a real-world case study.

Conclusions:

  • The developed optimal calibration design is effective for parallel test setups.
  • This method offers substantial efficiency improvements for large-scale achievement testing.
  • The approach is practical for real-world calibration of mixed-format tests with varying response times.